I have a thermopile connected to a circuit board that I need to replace. The plastic connecting plug (similar to the plug in the photo, which was easiest to photograph) won't release from its socket. The two wings on the plug don't seem to control a latch, although I could be wrong. I have tried to compress the wings as well as spread them farther away from the body without success in releasing the plug. I pulled on the plug firmly which feels like it would only rip the socket from the circuit board if I pulled any harder. Am I doing something wrong? Is the problem in the two wings?