Thorens TD-320

I recently bought a Thorens TD-320 turntable.  It worked fine for me, I need an auto shut off turntable as I have a disability and getting up in a timely fashion when the record finishes is difficult. I also wanted to try a belt drive turntable.  All was good until I decided to upgrade the cartridge.  This must be the first TD320 model

(Mark i?).  I bought a Hana SH.  I believe it has a TP90 tonearm.  The manual says it is TP-16 although the arm on the turntable does not look like the arm in the manual.

Here's my problem.  I do not see how you can mount a cartridge on this table.  There are shims that go inside slots.  Nothing seems to have threads. It's the worst designed arms I've ever seen for cartridge mounting.  I am a bit new to cartridge mounting in general so I'm wondering if there is a trick I'm missing.

Joe