No optical drive means extra space?

This laptop does not have an optical drive, but it looks like it still has the cut-out on the side (See image).

I looked at some of the disassembly images, it seems like there's just some space where an optical drive would have been. I have an Xbox one wireless controller adapter which I keep connected to an usb port most of the time. The dimensions of the cut-out looks like the wireless adapter can easily fit in there.

I'm thinking of making a small slot from the opening of the optical drive cut-out where I can put the wireless adapter into when moving the laptop around.

Can anyone confirm if this can be done? Thanks in advance!