The trapeze rotated to draw the aircraft inside the Macon.

https://en.wikipedia.org/wiki/File:F9C-2_Sparrowhawk_fighter...

See that C shaped bit on the left? As the arm is retracted, that C wold ride down to the fuselage to stabilize it as it rose up. Once the plane was inside, they'd close the hatches. Easey-peasey to climb out with a ladder hooked to the cockpit rim.