Engine wiring issues need help

[z_brutalis]

Hi guys im doing my first engine swap from 4ac to 4age
to clarify it is a 100kw 4age from an ae92 with a loom to suit an ae86
i have already purchased a digital fuel sender and assuming that it is a 100kw 4age id think the oil pressure switch is correct.
just a couple of things

the engine has been swapped over already and im now tackling the wiring.
for those who know plug 3d on the junction box next to the brake peddle has a broken wire green with brown dots and i cant find anything in the wiring diagrams that leads to this wire.
under closer inspection it appears that two of the green wires in that white plastic clip on the firewall have been melted and i have no idea how to trace them back and see if they are still good or need replacing.

on my original adm loom there was a voltage regulator in the engine bay. on the jdm loom there arent any plugs to suit this however there is an identical plug located in the passenger footwell attached to the same cluster of wires as the ecu plugs
i haven't been game enough to plug the voltage regulator into that plug in case it causes an earth where it shouldn't be. however i cant find anything else that it could plug into.

i have re wired my cluster wiring to suit the digital dash cluster using a diagram i found here
the tail light, engine, door,indicators all light up however the highbeam light is not working (globe is fine) and the speed fuel and temp displays do not light up when the key is turned to the on position.

i was wondering if anyone in vic near stalbans has done the conversion for the digital cluster that i can test mine out on to confirm it is a wiring issue rather than a cluster issue.
and if anyone is familiar with the wiring if i could pay you to have a look over it all and point me in the right direction.

the wires have all been channeled to where they need to go i just need help getting everything to work now

my mobile number is 0425 281 503 if you live local and can lend a hand either with the cluster or with the wiring at all any help at this point would be greatly appreciated as i feel like i have hit a brick wall in the conversion.