I would just do a continuity check (ie with a multi-meter) from one of the headshell leads to the RCA. The red headshell lead is the right channel +, green is right channel -. Pick either one, and test to the RCA + or - accordingly. This takes 15 seconds to do.
Telling Left from Right on unlabeled RCA cables
The gray RCA phone plugs coming out of the back of my turntable have no color labeling and no L or R on them. On one the "head" is about 3/8" longer. So which one is the left channel and which is the right channel to plug into the back of my amplifier?
Thank you!
Thank you!