Question about "New School Power Supply"

I got the 10 AA battery holder with the 2 posts that look like a 9V battery on it. I was soldering the wires to the posts and it melted the plastic around the posts and they fell through the plastic. Hopefully the JB Quick ( weld ) will fix it in a pinch.
My question is how do you solder the wires without heating up the plastic?

this might be too late :
  Mine looks the same as a 9 volt connection, but Radio Shack, and probably others, has a fitting that snaps on to those terminals with two short wires attached.
Snap it on, solder wires as usual.   

Yea, I thought about that after I fried the 1st one. Thanks.

It can be done, you just need to be careful.  Tin both components and then fuse them.