hi all just had to put new battery on my 02 tda red lead nut undone ok but could not undo black lead nut was well tight and the lamp just pullled off woth out undoing nut so it was not very tight at all and now i can not tighten it up it the clamp just seems to be sitting on the battery post and can spin it around how can i tighten the clamp up nut wont move either way many thanks