My Wildcat has a BAL NGX drop frame so I have more room for what some call my control panel.
It houses elec. and H2O stuff.
Here's my outside shower hose/coil with standard hose female threads AND the quick connect end.
Here's the center shower hose Output connection without the quick connect fitting.
... and with the quick connect fitting in place.
Like most quick connects (you might have one for propane for a grill), it has an outside spring loaded collar which must be pushed back while the little fitting is inserted then pulled forward to seal the connection.
Your quick connect might be different.