Blitz BLM Guage wiring

[Sidzrx]

I need help.
I have bought Blitz BLM guage\'s for my car but the wiring instructions are in japanese, so I need to figure out which wire is which.
There are four to be connected; red, black, orange and yellow wires. I assume that the black is my ground and the red is 12v constant.
That leaves the orange and yellow wires, which I assume are switched ignition and illumination, but which one is which.
Any help is much appreciated.
 
Cheers

[ftorex]

What kind of Guages..?? Boost Temp etc..??

[Sidzrx]

It\'s a temperature guage