Centre Diff Lock Light Connector loom location

Hi I have a 1989 90
I cannot seem to see where the wires come from that would connect to the centre diff lock switch on the transfer case.
I can see the terminal that it connects to, however there is no wire anywhere!
Please could some one let me know roughly where the wire should appear from so I can investigate further.

It comes down with the loom which goes into the driver side chassis rail at the drivers footwell, there are a couple of wires, reverse light, fuel tank sender wires and one for the diff lock light. It plugs into the bulkhead side of the loom as a single bullet.