Connector

1 . A connector, comprising:

a plurality of housings, wherein the plurality of housings comprises a first housing, a second housing which is stacked on the first housing, and a third housing which is stacked on the second housing;

terminal fittings to be accommodated into at least one of the first and second housings,

wires fixed to the terminal fittings, the wires being drawn out rearward from the at least one of the first and second housing, and

a rear wall portion including through holes for allowing passage of the wires,

wherein the rear wall portion is molded as a single component or single part, the rear wall portion is located behind the first and second housings and below at least a portion of the third housing,

the rear wall portion is formed with a separation restricting portion for restricting separation of the wires arranged in a stacking direction of the housings from the other wires in an opposite direction along the stacking direction, and

the rear wall portion is integrally formed to any one of the first and second housings.

2 . The connector of claim 1 , wherein:

the at least one of the first and second housings includes a plurality of terminal accommodation chambers arranged in a direction intersecting the stacking direction,

the terminal fittings are accommodated into the terminal accommodation chambers, and

the through holes are partitioned to individually communicate with the plurality of terminal accommodation chambers.

3 . The connector of claim 1 , wherein the rear wall portion is located behind the housing not formed with the rear wall portion.

4 . The connector of claim 3 , wherein:

the at least one of the first and second housings includes a plurality of terminal accommodation chambers arranged in a direction intersecting the stacking direction, and

a tapered guiding portion is formed on a rear end opening edge part of the terminal accommodation chamber of the housing not formed with the rear wall portion.

5 . The connector of claim 1 , wherein:

the plurality of housings include locking portions for holding the plurality of housings in a stacked state, and

the locking portions are formed only on both end parts of the housings in a width direction intersecting a draw-out direction of the wires.

6 . The connector of claim 1 , wherein:

the terminal fittings comprise a first set of terminal fittings to be accommodated into the first housing and a second set of terminal fittings to be accommodated into the second housing;

the through holes of the rear wall portion comprise a first set of through holes corresponding to the first set of terminal fittings and a second set of through holes corresponding to the second set of terminal fittings,

the rear wall portion is integrally formed to the first housing but separate from the second housing.

7 . The connector of claim 1 , wherein:

the terminal fittings comprise a first set of terminal fittings to be accommodated into the first housing and a second set of terminal fittings to be accommodated into the second housing;

the through holes of the rear wall portion comprise a first set of through holes corresponding to the first set of terminal fittings and a second set of through holes corresponding to the second set of terminal fittings,

the rear wall portion is integrally formed to the second housing but separate from the first housing.

8 . The connector of claim 1 , wherein:

a rear surface of the rear wall portion is on a substantially same level with a rear surface of the third housing.