YAESU-FT736-FT747GX-FT757GX-FT650-FT655-FT840-FT890-FT920-FT990-FT990D-FT847
FT1000-FT1000D-FT1000MP + MKV -FT2000
PIN1 MIC UP
PIN2 EARTH ( + 5VOLTS FT847-FT920-FT1000MP-FT2000 )
PIN3 DOWN
PIN4 FAST SCAN
PIN5 EARTH
PIN6 PTT
PIN7 SCREEN/EARTH
PIN8 MIC
Since you didn't mention the colors, I will assume your mic has white, Red, Blue and shield. A galaxy base mic has white as audio, shield is common, red is RX and Blue is TX.