House batteries not charging 2005 Sunvoyager

Going back to the beginning. It all started when I wired a 120V outlet that also had 12V wires in it. I didn't take care in placing the 12V out of the way and they created a short in that box. I later removed the 12V wires and Looked for a blown fuse but found none.A few days later The house lights were dimming. The 2 12V deep cycle batteries tested "Poor" with a hydrometer so I replaced them. Intelli_power 9180 output is 13.6V with battery wire removed. When I insert the battery wires the reading drops to the low battery voltage of 9.6V. The stud mount breaker check out fine. The Hi-amp Bussman breaker also fine.I added an new chassis ground to be sure that had a clean connection. I can run the RV engine for 10 minutes and get enough of a charge to get us through 12 hours. Right now I have a Genius 750 trickle charger going for 2 hours. Hopeful in the morning we'll have enough power built up in the batteries. Could I have melted some wired and still have a short??? I'm completely out of ideas and probably seek professional help.