I have two cracked headlights that still operate, but must replace them to pass
state inspection.  I found a vanagon in a junkyard, but I can't figure out how
to get them off !  I got the grill off easy enough.  I've changed many old
round headlights on old cars, where you unscrew a metal ring and take it off
the front of the bulb.  These vanagon bulbs seem to have a metal frame attached
to it, but the screws look to me like adjustment screws.  Am I missing
something obvious ?  I looked in my Bentley and it shows the round bulbs's R&R
to look just like what I'm used to.  But it has nothing about the rectangular
ones other than adjustment.

It's gotta be staring me in the face.  Please point it out to me.