1974 Questions for all other cars 1974 MG Midget

Electrical problem
1974 Questions for all other cars Two Wheel Drive Manual

my mother bought a midget that had an electrical fire, my husband and I are trying to get it running. I am trying to find an electrical diagram for the vehicle so that we can figure out if we have the wiring correct. It still wont start. We have tried a new harness but it is not the same. We are at a total loss on this. Someone tried to fix it prior to us starting and I think we have a royal mess on our hands