back up lights

gotta question, my 88t was an auto b4 i bought it. who ever converted it to manual did not wire up back up lights and i believe they left auto wiring harness in. my question is this what are the wire colors for the back up lights on an auto harness. there are 3 connectors that are not plugged up and i believe one of those is the back up lights but which one. the other question is if i find the right wire can i wire the 2 wires of tranny right into one of those. thanks for the help