Yes I did and I really appreciate your time. You said:

"Well, it's so long since I've touched one. If I recall, there is a battery screw terminal labeled + and - which are 24 volts. Yes, you can wire 2 12 volt batteries in series for 24 volts."

I have tried very hard to find battery screw terminals labeled + and -, but can't seem to locate those. I looked on both sides of the KSU and I looked all around the power supply. I am at a loss to where they are.

Once again, thanks so much to phonemeister and anyone else who can help!