Vehicle: 99 S420 (76k Mi) 90 300SE (87k Mi) 08 Lexus ES350 (7k Miles) 07 GMC Sierra (8k Miles) Sold list -->
Location: FL
Posts: 2,419
If you can't find them yourself, then you shouldn't be working on the A/C system. Simple as that. Follow the refrigerant lines! They are bound to be on there somewhere.
IIRC, the high side is in front of the radiator on the driver's side. I also agree that if you don't know what you're doing, you should get some more direct advice than what's available on here. That said, I'm not presuming that you don't know what you're doing.
__________________
1990 560 SEL, 130K. Smoke silver (702) on Champignon ("mushroom") leather (265). Minor mods: Euro lights, blacked out grille, Pioneer headunit w/ Polk db650 rears/doors, db1000 fronts, rear "dummy" lights activated as brake lights, 35% bronze tints, 15" 8-hole wheels, keyless entry system.
1983 300SD, 106K. Orient Red (501) on Java MB tex (154). SOLD