Cable breakage, plug, tailgate

Hello!

I found out today that some cables are broken by the kink movement on the rear flap arm. I could understand almost every cable, but with a connection, I'm not sure what it's for.

In the picture in the appendix is a plug connection in which brown/brown and white/black is connected to white/yellow. This white/yellow cable is broken and must be replaced. I just can't see where this white/black cable leads. Can anyone help me out?

On the occasion: Does someone have a tip for me, in which online shop you can buy such cables in reasonable quality? Should I use silicone sheaths?

Thank you very much.

Greeting Sebastian