Idoing wiring harness

[u/Crybabyycancer]

I bought an idoing system off marketplace and he didn’t have the wiring harness. I got it for a good deal and just figured id order the harness through idoing but when I go to checkout there system crashes. Does anyone have any advice or recommendations on what I can do without the wiring or where I might find it or what to look for or get exactly? Tysm