i've found a lot of great tips here on the forum, now I will ask for one as I just don't know what to search for I just recently removed the battery from my 07 x-type estate 2.0d to locate the reversing lights switch. I found the switch, but ran into this guy: .. Anyone here might know what it should be connected to and where? I've been looking around for about an hour or so, just to realize I do now know what I'm looking for. It reads tyco on it, and it's green and blue.
See pics




This guy was hanging around, under my battery





I removed the battery, and there he was ... outta nowhere. going nowhere, named Tyco

 

IIRC, that was used to keep the computers alive during shipping, it is disconnected when the car arrives at the retail dealership and the main battery terminals were hooked up.

 

There is a specific slot on the back of the batery box just for it.

 

so it's nothing. Cool.