I was just on my way out yesterday so didn't want to start diving into the diagrams.
The connector you want is C316, it is shown as being Black (BK) but possible to now to be Grey. You will find the colour code at the top of each connector pic.
C317 GN = Green,
C318 BU = Blue,
C319 WH = White
C320 BN = Brown
The unlock switch contact is shown as wire colour BK/GN, Black/Green and goes to pin 11 of GEM connector C316
FYI, if you do look at the wiring diagram the connector number if not shown to the right of the wire you follow the dashes to the next pin to find the connector number.
Look at the connector pic C316 to locate PIN 11