97 pathfinder rs wiring

Hi, I am installing a remote starter on my 97 Pathfinder. I have it working with the provided remote. I am  trying to wire it up so it will work with the factory remote. RS has an auxiliary input for factory remote. The instruction says to "locate the lock motor wire that tests a  positive when you press the lock button on the factory remote start". From the wring diagram below, does any one know which wire is this?

http://www.bulldogsecurity.com/diagrams/printpage.asp?ModelID=16501&MakeID=5

Instalation manual: (pg-12): http://www.bulldogsecurity.com/manualsnew/R82MaunalEngSpangoodlow.pdf