Hunter System Winterizing. Need some help with hookup. Valves not coming up

First year trying to DIY my winterizing.

Rain Sensor Off
Hooked up 20gal compressor to the valve
Pressurized the system at 60-80psi. Heard the air going strong
Turned on my Hunter Panel. Manual zone for 10 minutes. No movement.

I have a feeling i have the compressor hooked to the wrong inlet.

Any help appreciated. Thanks