Can’t get side cover on 833

Holy hell. I’ve never experienced anything so frustrating. After 4 hours and a trip to the lake to throw this damn 833 in it.... trans is good, but the side cover leaked a hair. So I ordered gaskets and seals. I carefully popped the side cover off. Cleaned the surfaces nice. And... 4 hours later. I tried pushing on the combs. I tried safety wire the combs both open yet I could still cut the wire and fish it out easily. I gave up. I want to take a damn 30 lb sledge hammer and break every single part of that transmission. I need help with this side cover guys. Does the trans need to be in neutral, gear? I literally didn’t touch a thing and carefully pulled it apart. What do I need to do here? Thanks.

The pic below is as close to getting it on as possible. Thanks.

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