tripwire

Ok, I received the "new" shock sensor today and I've installed everything up to Step 4. I cannot find the "brown" wire that I'm suppose to tap into. There is a 14-PIN connector that has some wires I tapped into per step 2, there are no Brown wires coming out of that.

Step 4 says "In the same harness, locate the BROWN wire coming from the 24-way connector." Where is the 24-"WAY" connector?

If it is the very large connector below the 14-pin "connector, I see one brown wire, but it seems as though it would be very hard to tap into, and the instructions don't show me tapping into that point.

If anyone has done this and can tell me what I'm suppose to do, that would be great. Thanks!