I do the same for both cameras. The SC2 locks in great. I can't get the SCT7 to lock on solidly. I did post a question about this very thing right when I got the camera. I do pull the outer shell back when I plug it in, but it always seems to be loose. This is basically a permanent setup, so I just tied of the cord to the handle of my OTA so there is no pulling pressure on the plug (strain relief). I'm not trying to weasel out of responsibility, all I can tell you is there was NO impact.