Casey,
I have used the locking NiCad glow battery for over 20 years. This is the type that you push down and turn to secure it to the plug. I use the short length version. There is a wire version that I used for R/C on a power panel and still take to our December contest just in case we get into the 30's (the extra power, the 1.5 volts vs 1.2 NiCad, from the power panel give better starts in cooler weather). I fly OTS and have upright or profile engine mounts so removal is not an issue, even when I fly piped PA we stood up so there was no problem getting it off. I like to do a spinner flip start and can hold the plug driver since this method does not stress the fuse.
If you like the alligator clip approach COX had a set up that held two "D" cells and the wires screwed on the ends. You might be able to find it on ebay.
Best, DennisT