Basic wiring colour codes

[Philpooma]

Quick question re wiring please. I’m currently installing a sandwich plate with oil pressure and temp senders. The pressure sender has two wires, grey and black, unfortunately the sender has Japanese lettering for the wires I just don’t know which is which, assuming G = Grey and WK = Black?
I have looked online for Japanese lettering and wiring colours but have come up blank

 

[iRELOADED]

have you tried looking for wiring diagrams for the parts?

 

[Philpooma]

Yea, I did that before I posted. I also looked up colour references for Automotive wiring in Japanese. All the instructions were in Japanese with no colour references I have since been told that it probably doesn’t matter which way the wires are connected.