For future repairs, find a new "technician".
Looks to me that someone questioned the health of that relay, tried to remove it, and when they realized they couldn't, they tried to force the cover off to get a look at the relay contacts. Been there, done that lol. Had the "tech" succeeded, the plastic tabs would have broke and the cover never would have went back on. Don't go back to him for at least a decade, he's not done wrecking stuff to learn on.
If I had a schematic, I would try to figure out what that red wire is connected to to see what else may have been damaged. If something else got damaged, there is a chance a thermal camera could find it because the bad part will either get unreasonably hot or not change a single degree when powered. If you can't find a replacement board, put it away until you find a real tech.
My advice in the short term is to order that relay and have it with the radio for when you are able to ship it out for repair. At least if that relay becomes discontinued, you'll have it already and the new tech can't charge you $30 for it..
