he states they are ta4f (common for wireless TX). To extend your would need to make or have made a ta4m > ta3f/ mini/whatever cable. Probably be best to have someone on here modify them to ta3f on the mic side and get a ta3m > ta3f extension cable, or just splice in a hardwired extension and terminate into desired connector for your powering source.
If you just want to extend the ta4f, shure makes a 15' cable for around $30 if i remember correctly
My solution will be to chop them even shorter to about 3", splice in 1 1804a length[3'](ala schoeps KCY), terminate into single ta3f, custom 3wire batterybox w/ 1 B3M connector.