Wiring Harness Plastic Sheathing? Options

[TINKERGINEERING]

Currently working on the wiring harness and found a couple wires in desperate need of replacement but they go through this plastic sheathing on the harness. Has anybody replaced wires through this sheathing? Should I just pull the wires out and try and jam them back in? I was also thinking I could just replace the sheathing, because it is 50 years old now, but how would I put new sheathing back on?
Thanks so much

[technicalninja]

I'll add another issue you will have to overcome.

All the previous advice is for the standard automotive wiring that we are all accustomed too.

You will have MUCH higher voltage and amperage for your drive package.

I am well acquainted with standard 12V stuff; I don't have to research methods or tricks.

I would do a DEEP dive into the EV world regarding best practices for your chosen drive package. The EV geeks may have different procedures for the high amperage stuff.

Be careful here! You can hurt yourself if you don't have all of the necessary info.

One of my acquaintances, who is Tesla swapping an MR2, built a pretty serious electric go cart...
It "got away" from him in his shop and did a bunch of damage before they were able to kill it.
Had it been the MR2 folks might have gotten killed.
It was a wiring issue that caused the run-away...

If you haven't joined an EV forum yet that is the single most important thing you need to do IMO.

I've never even looked for an EV forum, so I don't have a good recommendation.

Maybe someone else does.

You need an "experimental" friendly forum.

A bunch of "tinkerers" is exactly what I'd be hunting in your shoes...