Netgear RN426 - Seeing other NAS from within Plex to add content

This may be a silly, obvious question and I’m hoping that somebody can provide me that silly, obvious answer.

I had my Plex server on a Shield Nvidia Pro and the device bricked on me and I’m setting up a new server on a Netgear RN426. I have two RN426 devices, next to each other.

One NAS#1 I installed the server and had no issues adding content stored on this device.

How can I add content that is stored on NAS#2? On my Shield I was able to mount the NAS drives but I don’t see a similar option for the NAS.

Thanks!