Hello there. I think what you got is a universal type filter.I personally
have never changed the power steering filter on a vanagon,but sounds like a
good idea.The Bentley shows a larger type of filter.  Kinda like a thick
donut that floats in the resivour.I think it is white in color and can be
seen through the housing.If you want to use your filter, and I think you
can, place it in the return line that goes into the resivour.This line has
far less pressure in it than the supply line.The supply line has expensive
looking  metal fittings on either end, and is high pressure hose( will your
filter take this pressure anyway?).I think the return line uses a hose
clamp on the resivour.You may search the Bentley on line.This was posted on
the list a few weeks ago. Maybe you can see this filter there ,and compare.