My 98' 208 has the (2) small, round, black plastic, (i believe Perko) lift latches for the plexiglass over the cabin door.
If your boat is a 99' 226 they appear to be the same.
West marine does carry these for somewhere in the $25/ea range, with stainless equivalents for about $70/ea.
I recognized them b/c mine have cracked and broken, but like others have indicated I think the only people they keep out are the only people I would not mind having access.