I was just about to fix the CTek charger to the battery terms when I found this down the back of it

Anyone know what this might be for (it has 'Tyco' on it?)

This won't help much, but TYCO is just the name of the cable assembly manufacturer

Probably one of the many 'extra' connectors LR fit as standard

well being a diesel yours will have a fuel burning heater, so if that's working it's not from that.

So i expect it's from the transit relay. They remove it once the car is delivered and the connector becomes redundant.

As it happens my FBH is not working , but cannot see any 'spare sockets' on it that this would fit o
into

Mine as below....

Anyone have a picture showing wires from a top angle as I may be missing something

Click image to enlarge

Sorry, re post