Where is the pressure release screw

[Paul_374297456]

May be I 'm in the wrong place but here goes, Has anyone had to replace the front suspension spheres on a citroen xantia turbo diesel 1.9 sx hatch model and if so where is the pressure release screw? I have all the other info about changing them but haynes manual picture is a bit vague. P.S I use this car to tow my caravan. Any Help out there Thanks. Paul.

 

[WatsonJohnG]

Have a look here

http://www.aussiefrogs.com/shane/xantia/xantiaspheres.htm