Clifford 3.5 RS problem

Okay, I think the manual is out of date or incorrect. Anyways if I read the step by step instruction on the primary harness, the H1/6 Blue. that wire is suppose to be a multiplex zone 4. So I decided to install my 508D prox sensor there. But the problem is that it's showing up on my remote as a trunk. Not a problem about that but won't do warn, only Full Trigger. I look in the back where the picture is and that wire is for trunk, which makes sense now because it's wouldn't do warn and full. Anyways, which wire would I need to use in order to trigger senor 2 on my remote. I see that the shock sensor is senor 1 on my remote