Here is a pic.
It may look like the positive and negative wires are touching on the transmitter board but they are not. There is no way anything is cold soldered. The camera board was easy. They at least had solder on that board ready to go. I did have trouble with the transmitter board and I think they should have put solder on that one too to make my life easier. With a large picture like this I can see that the chip behind the positive wire looks to have heat damage. Chances are that with all the mucking around I had to do to get the wires soldered to the transmitter board, I may have gotten that chip too hot.