I've never actually seen the locking mech on an e36, but my father once owned a z3. The procedure should be the same.
There should be a latch above each visor. Release them, and pull it back.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>