Put three cable clamps on the cable then thread it through your eye or turn buckle, then thread your short end through the cable clamps, remember "never saddle a dead horse" which means the u bolt goes around the over the short end of the cable, the saddle goes on the long part of the cable going to the other end.
Once you have a loop made through your eye or turn buckle then insert the thimble and just pull it snug, it's a good idea to wrap the cut end of the cable with electrical tape or heat shrink tube to keep it from coming apart and getting all nasty like.