How to watch&listen when computer does not have a microphone

this is a difficult question to search because computer "speaker" searches as human speaker.

THe few search results i can find suggest that there are options upon launching zoom.

I can only find an option connect without audio.   But i want to connect with computer speakers but i don't have a microphone.  It's a meeting i only want to listen to.

THen once launched, i can test speakers (they are fine), but there's no way to proceed because it wants to select a mic and there is none.

How to get past this to enable the computer speakers.  (Video works fine)