Dometic 310 Parts Question

[IchLiebeBier]

Hi all,
I have a 310 installed and was hoping someone could answer a question for me. I've looked at diagrams online, but I can't find anything showing the area in question.

I accidentally dislodged the flush ball arm cleaning the toilet. Now I don't know if there was any kind of rubber gasket in the hole. It's the side opposite the pedal.

See attached pic from a video online. It doesn't look like there's one there, but I can't tell.

My seal is leaking, and I want to make sure I'm not missing another part before I go ordering a new one. I figured maybe a missing gasket was keeping it from pushing up against the seal properly.

Thanks.

[bubbles]

That side just slips into the hole in the bowl. No gasket etc.

[IchLiebeBier]

Thanks !!