Rear lights.

[Poodle]

You could just trace it with a multimeter. The outer contact is your earth, the sprung contact in the bottom of the bulb holder is the power feed. Check to see which terminal at the plug matches each sprung contact with the continuity setting. Similar for the loom on the car, except this time you can use the voltage setting: get somebody to operate the lights individually while you check for a feed at each of the plug terminals. Then mix and match as appropriate to feed the ph2 wires into the ph1 plug.