Side light fault.

I'm working on a 1991 defender 90 with the 2 front side lights not working.
I've got no power at the 2 light do I've traced the wires back to the bulk head but can't see were they go after that. I've got lots of connectors at the bulk head. Are they anything to do with the lights.
Any pointers will be appreciated

This is the pic of the connectors.
I've just put a battery on the lamp holders and they light up so I no the lights are ok. The rear side lights work and I think they r on the same fuse whitch are all ok.