Cartridge leads?

I’m talking about the pins on the cartridge 

I do a fair amount of cartridge mounting and made up my own memory device for this. All I need to remember is (R)ed for (R)ight signal and white for left signal. The correct pairings are remembered visually by the December holidays. Christmas (red and green), Hanukkah (white and blue). Anyone have a different memory device?

By the way. many cartridges have no color coding, only R+, RG, etc.

Thanks all, I was able to connect things up and it sounds correct and sounds wonderful.