7way Plug Wiring

[Debra]

So my husband decided we needed to replace the 7-way plug that goes from the trailer to the tow vehicle. He disconnected it last year from the trailer without making any notes. We bought a new cable with the same colors as the old. The problem is the wires coming from the trailer hitch are not color coded...

1 pink
2 green
1 white
1 brown
4 black

The old and new cable have:
white
blue
brown
red
green
yellow
black

Have searched far and wide to find a schematic for our specific trailer but it does not seem to exist. It is 2005 28RK Wildcat 5th wheel. I have attached a picture.

Wondering if anyone can at least point me in the right direction? Thanks!