Matt frederick

I recently picked up a Sankyo XL-400S from a thrift store for $3.00. It is immaculate condition. However it did not have an instruction manual. I would like to sync sound using the Flash method, but I do not know if this camera has the right socket. They are labeled(L-R, top to bottom) "MON" "AUX" "MIC" "9V DC" "REM" I am unsure of the first two.