Boot light switching

[Speed 3]

During bit of random fettling I noticed the boot light not working. Upon popping the holder I noticed one of the wires disconnected. Whilst it didn't look like it had worked itself free as the spade was quite tight when reattached, I reconnected it and it worked. Sure enough two days later I had a flat battery even on he trickle. I'm assuming it was disconnected previously for this reason. Anyone know how the switching works ? Is it a contact/prox switch or should it work off ECU logic (as I'm assuming the correctly functioning interior light does) ?

[Speed 3]

Thanks Tony, that explains why it was done. Just checked it and the light stays on even in the locked position. Pushing the locking arm down though makes it go out so assuming the prox switch needs some adjustment if it's possible.