voltage stabilizer no power

[checkrail]

I've discovered that the wire feeding the 'B' terminal of the stabilizer has no power comeing from it, it is a two wire one with a spade terminal and looks to be a faded light green. It goes down into the harness
This explains why none of the gauges are working, I changed the stabilizer before I realised there was no power.
I can't see that wire on the +2 diagrams that I've got.

Any ideas please, Thanks very much John