DSL, I'll help just in case anybody questions you... with a picture.

Here is a ThunderPower balancing tap for a 4S pack:



Every other manufacturer uses five wires (I've got the impression that TP uses an additional 'common' wire somehow).

I'm in the same boat. I'm beginning to think that there is no adapter, and TP does it so you have to buy their balancer, but let's both see if anyone has any good suggestions...