How to install a temp gauge..?

[Zushi]

Hey, I have a Pivot brand headlight retractor control with a built in intake temp gauge. its a Pivot RHU-T. I have an S13 Silvia but I would still like to use the gauge for the temp gauge, since i can't use it for the pop-up headlights. Anyone have any idea of how I would go about hooking that up? seems like it would be fairly easy. but im not sure. Out of the gauge i have 4 wires which group together in a small plug(a black, yellow, red and grey wire), then i have 2 other wires which group together(they are black and black/white) and a single red wire. any ideas? i think the 4 grouped wires are to control the headlight retraction...I dont see anything that would be used to take intake temp. well, i posted pics here . Thanks