Pioneer reversing camera help

[Dazzy2006]

I have a pioneer avh-p3100dvd which i have bought a reversing camera for but as usual the manual is useless as the only instructions it gives is:

"violet/white wire
of the 2 lead wires connected to the back lamp,connect the 1 in which the voltage changes when the gear shift is in the reverse position"

In english does that mean wire the violet/white wire to the +side of the reversing light in the boot?

As always - any help appreciated guys

[bigmac]

I would say that's what its saying

[Dazzy2006]

After a bit of messing around i eventually got it sorted

Thanks bigmac and scotsdragon for the help