Magnetic PFTE coupler dock/terminator

I really like the design of the magnetic PFTE couplers and I wanted to use it for a drybox. However I don't have MMU, only one tube is used at a time. So I designed a terminator to dock the tubes when not in use. To be used with M4 screws and nuts. The screws help to hold the coupler magnetically while no more magnets are needed to be used. The front part has a hole in the middle to keep a piece of filament sticking out for easy manipulation without opening the drybox. The back part does not have a hole, so airtightness is maintained at all times. Fusion 360 file: https://a360.co/3dtikh0