older grado cartridge hook ups?

OK, this is probably a no brainer. i am trying to install an older grado G2+ and it does not have the R, G, B, W color coded pins that i am used to with anything newer i have installed. any tips on what goes where?

1414f9bf 5ea3 4d58 bbf3 3af058a6fc70pablodeocampo
If it's like the newer ones, the black plastic has "G" for ground (blue and green) and "H" for hot (red and white), the "R" for right (red and green) and "L" for left (white and blue).
duh, i never even noticed the markings on the new cartridge... just went by the colors....