Ls swap temp gauge sender

[Kayceee]

Doing a ls swap into my holden vr v6 calais everything is pretty much done just the last 4 wires to the cluster are giving me a hard time i had a stand alone loom made at ultimate wiring coversions theres a green wire thats in the engine bay its suppose to go to the drivers rear head for a water temp sender for the cluster i wired it all up from the head and then wired up the cluster but its still not working even tacho and speedo and oil light arnt working is there any wires under the dash i need to connect or anything like that ( green wire is for temp and blue is for oil)