Advice wanted on running servers

I recently started a new job in data destruction, but i’ve never had hands on experience running servers. I had a basic computer/printer repair business before this. My only coworker is not a fan of sharing information, so I guess i’m trying to figure out how their system works. For example there seem to be a thousand cat5’s coming out of this thing that seem to go nowhere lol. Should I just untangle and dissect this server to figure it out? I’m kind of afraid of overstepping my position, but literally no one seems to know even what we’re doing over here except my silent coworker and the guy who built the server, who got promoted and isn’t in our building anymore (i’m basically replacing him). So i’m completely feeling around in the dark! Please help lol and thanks in advance