We are hanging up the electric fencing up today and we have two door ways that we need to put those yellow things you grab and you can move the wire. We need help we have no idea how toi install these and we can't seem to find anywhere on the net to help. Any advice. we are totally new to the electric fencing thing.. do you have to have two to connect to eachother for each string or is it one and it connects too a loop or what?? PLEASE HELP.