Brewing supply shops online sell a nipple that you can use to daisy chain the two regulators. I believe you remove the pressure gauge off the first regulator, install the nipple, install the second regulator to the nipple, then install the gauge on the second regulator. I'm thinking about adding a second to mine too.
Day after day, it reappears. Night after night my heartbeat shows the fear. Ghosts appear and fade away. Come back another day.