conceptually,it's really easy. IN practice,it sucks cause the wires are so small. if you strip back the wires on the mic, you want the active wire to the R or L post in the plug, and the sheild wire to the sheild post. On the other mic, solder the active wire to the other post you didn't use (R or L) and sheild wires to the same sheild post as the other mic is soldered to.
at this stage, you can gently test it out. if you get it working, secure your connections with silicone.