Finding wires for Solar Controller

[Daniellekristopher]

I was told by my RV salesman that all wiring and controllers were installed on my 2018 Cardinal 3350RL from the factory.
However, I noticed that my battery indication was a 14.9V about 6 hours after installing my panels. No shore power. So, obviously too much juice to the batteries. Therfore, I don't have a factory installed controller.

So I purchased a 30 Amp Go Power! Controller on Amazon, but don't know the color of the Roofmounted Go Power! wires, or wires to the battery. Anyone know? Or know how to find find them thru troubleshooting?

I do see a thick black wire w/ wire nut connected to a white wire. AND a thick red wire connected to a yellow wire. Could these by them?

[A32Deuce]

My wires from the same company are both black and paired together.

[A32Deuce]

Go power. Mine is not here to check, or I would.

[Daniellekristopher]

UPDATE: on my 2018 Cardinal with Go Power the solar wires are already connected to the battery via two thick wire pairs. Black to black (w/ red strip). Red to Red. Very bottom-left of the cabinet. they are the thickest wires in the entire cabinet.

The battery wires are reading 12.2V (same as battery)

The solar wires are reading 19 V. Same as on the roof.

PM if you ever have a similar issue.