Do you want to connect your GoPro Hero3 to the HobbyKing/Boscam video sender to transfer audio and video? You can easily build your own cable for this. We are using the Ridax 10-pin mini USB connector with a small integrated PCB together with the Boscam wire option available in the above link (the cable we make here can be ordered ready made from the above link at US$ 19,98 as well, but if you want to save $10 by some easy soldering, follow this guide). If you have a wire harness that was included with your transmitter, you can use it as well.
Important note! These transmitters do not output +5V regulated power so you must not connect the red power wire, or you will burn your GoPro.
Note that these instructions are not valid for the Immersion RC video transmitter. For description on building a cable for that transmitter see http://chargeconverter.com/blog/?p=154
Carefully check the wire harness you received (regardless of whether you got it from us or together with your transmitter) and make sure that the wire colours corresponds to the colours in the picture and that they are connected to the same pin positions in the transmitter connector. If you have more wires than black, yellow and white you can either pull/cut them or isolate them.
Solder the black, yellow and white wires to the PCB connector as shown in the picture above.
Put the connector into the cover half with tabs and arrange it and the wires so the wires exits correctly.
Remove the connector from the cover and put some hot glue (or similar) into the empty cover and put the connector back again.
Put some hot glue over the PCB and the wires to fixate the wires and then close the connector cover.