I have now moved onto putting together the wiring loom for the van and have a few connections I cant account for.

I think they may be the dashboard lights (i.e. the black ones with the alternate colour lens) ?

I dont know the origins of the wiring loom it came with the van but it did have the dim-dip crap on it so that makes it fairly late eg.. 1987 ish?

The yellow circled connections are paired brown and white, brown and green and brown and blue. makes me think the brown is the earth?

The orange circled connection is white and brown and comes out the loom right on the foam grommet at the bulkhead.

Any help appreciated.

the orange circled one, it's not the brake switch or brake fluid warning??

well i had a similar question, when i pulled my dash out to put a switch in, i noticed tghere where a few green wires with those ends, similar to yours, just haning in the breeze, so i assum ethere for differnet type dash's etc, i know thats not to helpful, but its definally green ones haning around

Blue and brown: High beam warning light
Green brown: Direction indicator warning light

Brown white: possibly your hazards warning light?