Please help with Grado Cartridge hookup Wiring ???

I have a Grado and drew a diagram as I have seen a tons of posts all asking how to wire these carts.
https://danob.imgbb.com/
Hold the cart so the letters G R L H are upright/as you normally read text.
The horizontal L and R  is for Left and Right
The vertical G and H is for Ground and Hot, so...
Top Left is BLUE wire (Left Ground)
Bottom Left is WHITE wire (Left Hot)
Top Right is GREEN wire (Right Ground)
Bottom Right is RED wire (Right Hot)

Easy breezy :)

I guess this makes sense if you have a color-coded scheme in front of you, but if I were a neophyte, I would only be further confused by the two responses.  I'd like to believe that R and L indicate Right and Left hot connections, as for 99% of all other cartridges.  So what is the point of H? I have read elsewhere that Grado's or at least some of them are unusual in that the two channels have a common ground. Hence G.  For example, Danob gives the correct response for most cartridges:Top Left is BLUE wire (Left Ground)
Bottom Left is WHITE wire (Left Hot)
Top Right is GREEN wire (Right Ground)
Bottom Right is RED wire (Right Hot)
Most cartidges would have the blue and green pins (two pins, not one) labeled "G" or "Gd". But that doesn't explain the Grado letter labels. L, R, and H cannot all be for "hot". (Same for SDCampbell).

Grados hum on certain turntables.  Is yours a Rega?