[DCRthe3rd]

Wire sheath? As in, the plastic casing of an electrical wire? How would you attach that?
I really do appreciate your help guys. I'm sure I'm not the only one with these concerns.

That's what i did. Just slip it on.
Somewhere maybe this forum? Someone said what size and for the life of me I can't remember.
You may be able to eyeball it if you have automotive rolls of wire where you go you can look at.
I want to say it was 12 , but ya know..... I just ain't sure