If the 5.25” controller doesn’t have a drive attached then your IIe will hang there forever without a prompt showing up.

I can’t really see the cards in the machine very well but the superdrive controller is longer than a disk II card so you must have a Liron card. The Liron cards only work with the 3.5” Unidisk which isn’t that common a drive.

I’ve used the IIgs 3.5” drive with the eject button on my Macs lots of times. I’ve seen schools with a whole room full of Macs with IIgs 3.5” drives that Apple sold them. Now I wouldn’t plug the 5.25” drive into any Mac.