JRD3

Hello everybody. I'm trying to figure out how to reinstall one of the factory radio plugs that someone cut out. I cut both out of a 2005 gmc envoy and all the colors seem to match. I'm curious about the bare wire though. Any knowlegable help would be greatly appreciated. Also I'm getting several airbag sensor codes, along with some loss of communication codes. And a knock sensor code. Could these be related to the cut radio harness?