sensor light

Can someone give me advise how to wire this outdoor sensor light up? The yellow and blue wire is only free. The other brown and blue wires are crimped together, does the house brown wire need to be connected to this brown lot? I don't have the instruction leaflet with the light, was got of...

Hi all, I have 3 bathroom mirrors with sensor lights, 2 of which have failed...I suspect the third is incoming. I'd like to replace the transformer for sensor switch on all of them, but I can't seem to find an exact match for the part. Would this work...