Pixhawk blue cube is identical to the Pixhawk 2.1 cube but has been manufactured in the USA. It is compatible with all Pixhawk 2 carrier....
https://airsupply.com/product/herelink-pixhawk-remote-controller-hd-transmitter/

Air Supply offers a Cube mini carrier board that comes with a DF17 connector. This connector allows you to flawlessly connect with every Cube flight....
https://airsupply.com/product/mini-carrier-board/