Have you downloaded the schematics? I'm adding a couple of pics from the front door schematic. The cabinet schematic shows the front door wiring.
Cross reference the wire colors against the key.
For example, the brown white wire you are showing is a 65 wire and that is for the #1 coin chute, closest to the hinge.
You can find the schematics here: https://www.ipdb.org/files/1858/Bally_1978_Power_Play_Schematics_paginated.pdf