Pixhawk 6X Telem2 to USB companion computer

Hi - I have upgraded to a Pixhawk 6X from a Pixhawk 2 and want to continue using my Raspberry Pi Companion. The documentation says that Mavlink listens on Telem2, but I cant seem to find how to change it to USB-C connection, given the enum here: Parameter Reference | PX4 User Guide

Would it be better just to buy the following?

Anyone have an answer?