Ok, let me get this right. I have a d390 that I am wiring externally. Now, as far as the wiring to the camera is concerned, all I have to do is solder the refresh and the shutter wires properly and plug it into the board. right? I dont wanna mess this up, this is my first attempt at my home camera. By the way, I went to wal-mart and bought a dc jack that was part of a ac/dc converter. I planned on using that for my dc power cord, is this all right?