"but i have so much stuff hooked up to my battery that I'm using both the side terminals and the top terminals,"
A side note to the bigger discussion....but if you are looking for a better way to run battery power to accessories, I would look into creating some sort of fuse panel or at least single electrical post to put your accessories power connections on. Here are a couple options I have used:
1) simple solution for full time 'hot' +12V accessory post is something like either of these two - run a short bat cable from positive battery post and then add whatever you want on top of it. I use the 2nd one in my 58 as I haven't made the jump to a full fuse panel yet - but will:
Here is mine in the 58:
2) If you want 'switched' 12V source - is not hot all the time, just hot when the key is switched ON or to ACC, you can go with a relay. A lot of the small 30A relays with blade connectors didn't seem like enough for my uses in the cj5. As I wanted the relay to power a small fuse box that could pull over 30A easily if everything was on including the seat heaters, I went with a cole hersee relay solenoid.
Here is mine in the cj5 - I really like this set-up as it allows me to have 2 fuse boxes (neither the cj nor the willys came with fuse boxes - all circuits were protected with inline fuses): one box is always hot (like headlights or communication devices), and one box is only hot with key is switched on - which is really good for things that might get left on and kill the battery.