Thanks Pawel,
I can certainly put some solder on the end but forgive my ignorance as not sure what you mean by 'to the terminal and screw it' should I be inserting a screw to hold the wire in the hole?
The two holes above the antenna ones have a two pronged plug inserted in them from the loudspeaker.
These two holes that had the black plastic pluc in them look slightly wider and I think don't have a brass ring iaround their edge like the others.
Should I be putting a crew in one of these holes to hold the copper wire in place, and if so is there a standardized guage for it or is it just a question of finding one that fits?
Thanks!