The Back Up light wires do not route to the connectors in your picture. They instead route to the passenger side to C131 (terminals 14 and 15) located near the ECU. (for manual tranny)
The information you need is in the three diagrams below.
Here's a summary of the circuit:
Switch--2 Grn/Blk wires--
2P connector C124--1 Yel wire/1 Grn/Blk wire--
22P connector C131--Yel/Red wire(
to dash fuse box)/Grn/Blk wire(
to back up lights)
C124 = Back UP light switch connector
C131 = behind passenger kick panel near ECU