Sending Laptop USB midi TO MRCC

[awvantage]

Hi 

Conundrum here:

New Arturia Midi Controller is now USB C only (cheers Arturia) so...

1. Arturia to Macbook USB C

2. Macbook to Caldigit Hub USB C

3. Caldigit Hub to MRCC USA A to Host Port

What must I do to send USB Midi from 1 to 3?

Forgive me if I'm being thick but this device doesn't work the way my brain does...

Regards

AJ