Boxster (986) F6-2.7L (2000)
The plug-in couplings are opened by unscrewing.
They are joined by plugging together.
A detailed description about opening and joining is given in Plug In Couplings.
Steering return line on hydraulic pump
To release the return line, press the red unlocking ring (arrows) and simultaneously pull the line out of the hydraulic pump.
Join by plugging together in a straight line. Then pull slightly to ensure that the connection is properly locked.