Power your CW1-TX Transmitter with an SSL-JVC50 battery using this dedicated Battery Adapter from IDX. The adapter features a cold shoe on the bottom and a receptacle on the side that holds the transmitter, so you can camera-mount the entire setup as a single unit.
The cold shoe is secured into a 1/4"-20 mounting thread on the bottom of the adapter by a 1/4"-20 screw that comes out of its other end. It can be removed to reveal the mounting thread to allow other ways of mounting the adapter. It can also be flipped over and attached into a sled on the bottom of the adapter, in which case it will provide you with a 1/4"-20 screw to use to mount the adapter.
The adapter features a USB output and plugs into the CW-1 transmitter via a USB connection. You can use the USB-to-mini-USB cable included with the CW-1 system. The SSL-JVC50 battery is sold separately.