UnRaid compatible optical drive bay accessories?

[Aquenon]

Hi,

This is an afterthought, but I do have 2 5.25” empty drive bays that I’d like to do something with.  Ideally fan control/temp sensor that interfaces with the motherboard if possible.  Now I don’t have much room especially in the top bay because of the tubes for the radiator.  Picture of room (or lack thereof) in my 2 5¼” drive bays

 

Looking for possibilities, but it’s not something I’m dead set on doing.  Just something I’d like to install if it’s possible.  This is a Fractal Design R5 Define case.  The radiator is so close because it’s a 140mm x 420mm radiator… I might went overkill… but it is cooling a 13900F CPU.

 

If anyone has any ideas, I’d appreciate it.

 

Thanks!