You can pair the G Pro X Wireless to a G933 dongle by removing the left earpad and pressing the hidden "Pair mode" button with a pin
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When you press the button the green LED starts blinking. At this point plug in your G933 dongle and press the button on the dongle with a pin, the headset should pair with the dongle at this point.
The Logitech software will see that a G933 is plugged in, but will always show it as "Inactive", but the headset will fully work.