IO 96 and Digidesign C24 - How to connect everything

[Sondre]

The school I work at recently got a hold on a Digidesign C24, Digidesign IO 96, and a Mac Pro 2009, along with some multi-cables. I got ethernet connection between Pro Tools and the board for controlling it with Pro Tools, but I don’t understand what I am missing to get sound to work. I got some DB-25 to xlr cables for outputs and cues.

1. Do I need a DB-25 to jack cable and connect that to the IO 96 for inputs to get sound in?
2. To get sound out, do I need to connect the jack outputs from the IO 96 to the DB-25 in to “Pro Tools In”?
3. The Pre-amps for the C24, that’s just controllers for the IO 96 preamps right? If I connect further preamps with the IO 96 through ADAT, should the C24 controllers for the preamps still work?

Thanks in advance for any advice!