Wiring to switch over to tankless hot water heater

[Notalwayslost]

I have a domestic Gc6AA-10E and I plan to switch it over to a tankless system. My new tank only has two wires to connect. (The 12v and ground) does anyone know which wires running to my current dometic out the 12v and ground? The wires I have going to the dometic is the Brown, green , red, yellow, blue and white. I will try and send a picture showing these wires. Thanks for any help.

[Sharpeink]

I hope you can see this upload, However Always use an Electric meter and Check your voltages. If you are not comfortable working with electricity hire a qualified person to do it!

[larrypride]

Is your new water heater gas? I’m not familiar with RV instant water heaters.