I cut open the sprinkler connection cable that was not buried as well as it should have been, near my garage door... cut it with a trimmer. Now two of the zones don't come on. So I assume I need to splice the cable... it is 7-strans sprinkler connection cable. Do I just splice the same way you splice any cable, or is there a special way to do it? I can't find much info, but I assume I am not the first person to do this... Thanks!