Using the JR Pass on busses

Hello there.

Thank you for allowing questions to be posted on this forum. :)

I'm not quite sure how the JRP works on JR Buses. The information on this web page says to get on at the rear of the bus then pay when you get off. With a JRP do you just show the driver the Pass when you exit the Bus at the front or is it necessary to go to a ticket gate like the Train system.

Cheers.

Tony