24601 if you had a quad 12 you wouldnt have to tape your batteries in!

The way i used to do it is unroll about six inches of tape cut it double it up with another layer and run it thru the slot and under the chassis set the batteries in pushing firmly with your finger lay down one side then get the other and lay it down over the other layer. now you have about 2 layers of tape securing the batteries in! Good luck.