Hassio, Snips Add-On, not detecting ReSpeaker 4-Mic Linear Array

Hi,

I have HassIO installed on a RPI 3 B+ and I’m trying to use the ReSpeaker 4-Mic Linear Array with the Snip.AI add-on. In the pull-down menu for input, there’s only “-”. For output there’s “bcm2835_alsa - bcm2835 ALSA: 0” and “bcm2835_alsa - bcm2835 ALSA: 1”.

I’m pretty new to all this, so how do I setup the ReSpeaker mic for the input?
And which should I select for the output?

Thanks