Ok, thanks to some help from NXTIME I now know I'm missing part of the harness to plug into my R33 GTR-V.
I'm not liking my chances of getting hold of one of these, but will keep looking.
Is there anyone out there with the HKS ETC in a R33 GTR, that could take some pictures of the harness and or some close ups of the wiring so I could splice in ?
Cheers
Kerry