STEP 07
Now look at the BCM (J519) which is located above the drivers side footwell, to the right of the steering column.
The white BCM plug has a small tab in the middle of it, press that down then pull back the black latch. This will release the white plug (T52b).
Cut the cable tie which holds the factory wiring harness in the plug (T52b) - keep in mind, you will replace it soon.
The wire on the footwell wiring harness with the pin on it will simply plug in on position/hole #50 of the T52b plug.
STEP 08
Once the wire is in hole #50 put it back in the shell and replace the cable tie which was cut to prevent any chance of the factory wiring harness coming out.
Make sure when you re-assemble the plug you hear the clicks when the tabs are closed.
STEP 09
Connect the footwell lights to the wiring harness plugs which should be hanging out of the holes of the factory trim (perforated rectangles - just push them out).
Before cleaning up and putting the trim back the car should look something like this:
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