I've been screwing around with replacing this seal in my toilet tank. It's a dual flush toilet that uses a canister rather than a floating ball old school style water valve.
In the pictures, there's a chewed up black rubber seal I need to replace and there's two plastic tabs that look like you have to do something with but they don't move. The second picture has a side profile of the plastic tabs.
Sorry for showing Beyond a pic of my toilet but i've been messing around with this off / on for the last hour and no luck.
Anyone have any ideas on how to do this?