Install plex on Seagate central? (ATV 3 and mac) or other random NAS.

Hi, i´d like to start off saying im really new to this kind of stuff. Well, i managed to connect my ps3 and computer using Playstation Media Server when the ps3 first came out, but that was a couple of years ago, so please be patient with me. Anyway, i did install PMS on my macbook yesterday and got it to work so i could use the trailers "exploit" on my appletv 3. Worked like a charm and it was a real pleasure. But now i'd like to install it om my NAS (seagate central) that i have. How do i do it? I´ve searched the web a coulple of hours but i did not found any info for that particular NAS, only the big and famous ones ex. Qnap, Synologi and some more. Can i use the same guide that i used on my mac? I dont think so, and if i do, when i use the terminal to create the certificate, how do i enter the pathway to the nas. Its easy when its on the mac but when its on the network, how do i that? Also, i have a macbook, and im just starting to learn it. Been using windows my whole life before. I´d really appreciate if some one could help me!  

It is probably worth asking this in the dedicated PlexConnect sub forum