1993 300ce cab connection and frayed wires

[zeggate]

I noticed a terminal with wires connected to the drivers firewall. A connector/plug 0125452428 pushes into this terminal. The wires from the terminal go into the engine compartment and (at this point some of the insulation has come off the wires down into a bracket and a large jacketed wire. No problems with car yet.
Does any have any pictures and a solution. Thx