repair kit loom?

[svandamme]

Is anybody familiar with this repair kit for the 9x7?
99761290801




My starter sometimes turns over weak when engine is hot.
I think it's the wires/ground and most likely 99761290801 will be the ticket?

But Can't find much intel of what the kit is supposed to fix, or if it contains any instructions or what else is involved.
at 200 something bucks, Obviously porsche tax is applied since it looks like just a fat wire.. I could probably fab up some thing myself, but the car is original, and for better or worse I'de like to keep it clean (and my own handiwork would most likely look redneck/mcgyvered)

Anybody has any additional info on this?