I have prebuilt pc, with what seems to be like 8 fans, I checked the cables at the back and its a whole jumble of mess. Was trying to see if I could eventually add more storage in the future but came across some conflicting connections. I did see a few SATA cables but most of them are connected to LST cables and I'm not quite sure what the function of it is. I did see the connections made it to some power thing? The plan was I wanted to add-on SDD for extra storage.

https://imgur.com/a/why-are-sata-cables-connected-to-lst-cables-ZDgMzbl