I just struggled with the pully installation on our TiiCo too. Figured
it out about 20 minutes ago and called it a day.  The mounting plate
on our TiiCo has 4 "mounts" attached to it.  On ours, from left to
right the A/C compressor went in the first position, {after hammering the
threaded insert into the rear side of the mount), the next mount
receives the slotted belt tensioner for the A/C, the next the
alternator, and the last (hanging off of the end) the P.S. pump.  Some
things that we had to modify were: the alternator mount wasn't quite
big enough to accept the alternator base.  It had to be persuaded a
bit.  The belt tensioner for the A/C caused the biggest headache.  As
delivered, it would not allow the alternator to move far enough toward
the loose belt position to allow the belt to be installed. I finally
saw that the base of the tensioner was striking the base plate
restricting it's motion.  About 15 minutes at the bench grinder and
all's well.  The belt shown in the illustration going from A/C to
Alternator was not included in our kit (P209 I think it was), thankfully I had a belt
hanging on the wall that had been the wrong size for my Jetta.  Worked
perfectly.
Clearly this is not a job for the occasional mechanic.  So far my
skills seem up to the job, and I am enjoying the challenge.

More as it develops.

Gary