oner, as for the side clip, once you have unhooked all the top and bottom ones just pull it out and the side one will also come out. It wont snap or anything, and you dont need to use much force either.
as for the right angle tool, i didn't have access to one. instead i got a metal coat hanger, unwound it and bent the last 5mm or so with a pair of pliers and worked just as well. the wonky bit from where the coat hanger used to be wound up actually provided grip to manipulate it. just thought id share that incase anyone else doesn't have one of those right angle hook tools.