Xenith/Unity enable unused internal UART port?

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i remember there was a thread quite some time ago about this as well, let me see if i can find it

edit: @esc_sequence i found it

Unity internal UART wiring

Hey, Just got my hand on a maytech V2 remote, and to display telemetry the receiver needs to be wired to the TX and RX from the uart port, since the main uart port is already in use, i wanted to use the port of the integrated bluetooth module (wich i removed a long time ago). Does anybody know the wiring of the internal uart port ? I can’t find anything on the unity pcb, and since i lost the original bluetooth module, i don’t know if there is any indication there. Cheers