Acorn A3010 A3020 USB Lead holder and Back Door

For the Acorn Archimedes A3010 and A3020 computers where you've added an internal USB connector.    The problem is that you then need to keep opening up the case to change out the USB key, or have a flying lead out through a hole you've drilled and cut open.   Neither ideal.

This uses a USB extension lead bought from Amazon:

https://amzn.eu/d/09aFys7r

I printed the Back Doors in White PTEG and the rear panel in Black PLA.   Mainly because I had white PETG.

The enclosed plate is there for you to change the material types and not to try to print all at the same time.