House Batteries 2 6 Volt Deep Cycle Not Charging

When you say they were "Empty" do you mean the cells were dry, plates exposed to air?

Replace the batteries. Sams club(and selected Costco) stores seem to have the best day to day price on GC-2 Golf car batteries.

BEFORE YOU REMOVE

Get a can of red spray paint and find the positive terminal with wires that run off to who knows where, SPRAY THEM RED.. optional black on the other end (negative). Wait a day (or night) and then remove and replace.