Yes, that's it. It looks like a large schrader valve, like a bike tyre valve.
If you buy a can of refrigerant the fitting will only fit on the low pressure side to charge it - the high pressure side uses a different fitting so you can't mix them up and accidentally blow up your filling machine.
Best,
Drew
If you buy a can of refrigerant the fitting will only fit on the low pressure side to charge it - the high pressure side uses a different fitting so you can't mix them up and accidentally blow up your filling machine.
Best,
Drew