I'll go crawl under the white wagon and see what colors finally sealed mine. I had all kinds of trouble hitting on the correct-for-me solution.
Will edit my findings........

Green on the driver's side
Red on the passenger side.

Looks like I have a leak after 3 years. I added a can last week and have oil residue back on the compressor that I had just wiped off. I tightened the 15mm "single" bolt just a bit......

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John