Is there a way to tell which prong (out of two) on the MSD 50 lb injector connects to the power lead or signal wire and which goes to the ground wire?

I bought Bosch connectors and I just have to solder the wires to the appropriate stock wires.

Steve

I think JacksonDiamond mentioned before that it doesn't matter which way you connect the wires. I don't remember which way I did mine because I followed his advice. I just made sure to stay consistent across all four injectors. Has been ok for 6,000 miles so far ;)

Same with me...I just installed the 50# injectors and was carefull to keep the wires consistant with its location on the stock injectors. Polarity does not matter.