[Tigers] "vent window assembly" removal

[Rollright at aol.com]

Hello,
 
Got the Tiger out of storage and brought it home today. Though raining  
lightly, I had brought in last fall with the hard-top on. Made for a cozy ride  
home.
 
Grabbed the service manual and tried to find the section in the "Body",  
section O the would tell me how to take out the "vent" window assembly. No 
luck.  not there.
 
Can anybody either tell me where it is in the manual, or if it  actually 
isn't there, how to get the A-frame vent window assemblies  out?
 
Thanks in advance,  

Jim  Armstrong
Mk 1A  
382002083
LRXFE