A basic mike is relatively easy to configure the wiring to function on non-OEM radios. If your dealing with an 8-pin connector, it may be a little more involved. If you have a copy of the radios' schematic [if not, get one], see what the original pins connect to, inside the mike. Now take a possibly usable mike, and analyze if its' wiring is exactly the same [great if so] or if it can be reconfigured to function with your radio. There is a plethora of 'Microphone Wiring' wiring information on the internet. Quite possibly a mike designed for another transceiver, will be exactly the same as your original, even though by a different manufacturer, etc. Determine what functions the mike has [PTT, up/down, power[voltage + or -] audio line (always a shielded wire). If the mike has DTMF capabilities, the generated tones are 'impressed/injected' upon the audio line, during transmit. If the project is 'over your head', get with members of your local Amateur Radio club, or a TwoWay Radio Service agency, for help.