I was not able to find any connector plug for a Tx_Liploy_Pack on my HK 6ch Tx.
How to use a Lipo Pack for this Tx?

If this is built to support regular AA cells, you will have to find the wires that go into the PCB and solder on a connector of your own (using JST, Deans, or some other type of connector).

http://farshidjh.files.wordpress.com/2010/03/hobbyking-6-channel-trasmitter-views-6.jpg

Note that people seem to be preferring 2s lipos on these.  If you want the voltage warning to work correctly, they are adding a 20K resister in parallel to the existing 10K one (for a 2s setup). Unless you know what you are doing, do NOT do this, and just watch out for lipo drainage manually.

http://farshidjh.wordpress.com/2010/03/01/model-radio-transmitters-and-hobbyking-6-channel-transmitter-guide/