Tom

You're right - and I was wrong.

The 221 does not have screws, but small brackets, that you turn outwards as shown in the manual here below

53c36d7188b38ba78ef6ef8b997f5ebe18599eb2

This picture shows, the small "opener" turned a bit by my screwdriwer.

97436b3a83e3866e8aa0ef82994c5208c1313580

A small hint: When you try to put it back together, mount the drivers cab in the upper housing, then it slips back on much more easy.

The method is not described in you user manual, but the openers is shown in the parts list (no 15 in the online partslist for 62841)


Klaus