Wher are my air fuel mixture screws or caps?

Hi guys!
I'm in the process of cleaning a set of MIKUNI carbs from my
82 KZ1000 M2 CSR. I don't see the air fuel mixture screws or caps to drill out. Am I missing something? I ordered a service manual but I don't have it yet. Any help would be appreciated.

Well.... After cleaning all the muck off I found them. They're on top. Just got finished boiling them in lemon juice and they look great! That lemon juice works wonders.lol

They are plugged with the pilot mixture screw very close to the plug. If you drill the plugs, you will likely nick the tops of the screws, so be careful. If you remove the screws, replace the orings which are REAL OLD and likely not working very effectively. When you replace the screws, turn them in till very lightly seated and then out about 1 3/4 turns.