Identify these wires please

[dangerdave]

This is a separate question from my battery switch thread.

The batteries in the picture have been replaced with deep cycles, and I arranged them in parallel from a youtube video.

What are each of the Red, Blue, Yellow wires servicing?

Thank you!

[Grumpy]

One should be the break-a-way switch and one should be your main 12 volt supply. Do you have an elec tongue jack.

[tnchuck100]

These should be easily verifiable.
Blue is going to the converter.
Red is going to the tongue jack.
Yellow is going to the breakaway switch.
Picture is somewhat obscure so the red and yellow might be reversed.
What I do not see is a 30 amp in-line fuse that should be somewhere in the larger black wire w/blue terminator.

[dangerdave]

Yes I have an electric tongue jack. There is a lot of stuff to the sides in the frame, so I'll look for the in-line fuse.

Thanks!