AXYZ Z7 Mister Connections

I have a AXYZ Z7 and would like to connect a mister to it but I really don't want to pay USD2,500 for theirs. All I need is an air connection on the gantry and I can use any make and model. There is 4mm PTC (push to connect) for the pressure foot. There is a 6mm PTC with nothing in it. Inside, the 6mm line runs to a solenoid that is powered by the PC board. Does anyone know what that 6mm PTC connector is supposed to be used for and how can I power that solenoid?

I already tried Tools Manager/Tool Properties/Auto Mister and Air Assist. Any insight would be most helpful.