This is a case for the Vail Adapter, a CW USB adapter to use physical cw keys with a computer or mobile device. 

For more information on the parts needed to use this, check this out - www.vailadapter.com

This case accommodates being able to reach the reset pads on the xiao board as well as the boot button on the qt py, without needing to remove the case. two small holes to reach either. no need to print the right case, since both are on the same case no matter what arduino you use.