Cover for MMU hole with hacker board pass through

I used Steve's model https://www.printables.com/model/1016997-prusa-gpio-hackerboard-cover to mount my hacker board to the frame (it's a great model). I removed the “plug” in the cable holder which is normally punched out to connect the MMU cable. Since I don't have an MMU this left a  gap from the top into the electronics enclosure and I considered it a risk. 

I designed this small “plug” to fill that gap. I printed it using Fiberlogy FiberFlex 40D filament so it is a friction fit. It can be installed from the top with a bit of finger pressure. If you have trouble you could loosen the two screws on the side of the bracket when you insert the plug then tighten them back up.