Where is the boost compensator and what does it look like on a peugeot citroen 1.9TD engine with bosch pump?

Where is the boost compensator and what does it look like on a peugeot citroen XUD9TE 1.9TD engine with bosch pump?





Mine is in a Citroen Dispatch van so some stuff might be in different places to the cars.





Note: the intercooler is front mounted, unlike the cars.|||The boost compensator unit can be recognised by a brass coloured diaphragm assembly connected to the intercooler by a vacuum hose.