I read pervious posts about this issue but I'm not quite sure what to do. I drained the oil before I could get the filler bolt off (17mm) and now I cannot get the filler bolt off for the life of me and I think it managed to strip the bolt a bit

so now I need to fill from somewhere else, someone said the reverse switch, but there is some kind of rubber boot on it and I can't seem to get it off...can someone help me!!!