CX300 please help

Okay, here we go. Last Saturday, I picked up (less than scrap) a CX300 with 2 power Supplies, 2 SPs, and 8 Seagate 15k 30 Gb Cheatas! I downloaded what I could but It claims to want FLARE™ software and
EMC Navisphere® Agent. I don't know what's on the SPs as I have not spun it up. I want to connect it to my Debian 10 Server which has a RAID VI 3x 2Gb drives, after I confirm the EMC will spin up then I will update my Server to 12.x 

QUESTIONS

1. 1. I noted that their is a Ethernet Jack RJ45, what speed, 2x FE ports, a port with a orange box around it, DB-9 with monitor, and anorther DB-9 with a battery icon? what are they for??
   2. does the RJ45 support connectivity to my Server or do I need a FL cable and adapter?
   3. The service Tag has been removed. what do I do? 
   4. the SP: PN 005048349 rev A17  SN: CF2BF053100214  & CF2BF053100197
   5. the power supplies are 118032322 sn AC131052602943   & AC131052603822
   6. the rack PN:00548348 SN: APM00053702953

• Where can I download the software and Docs and a service manual would be nice:) (free Ihope)
• I hope i can use 300GB FL drives

• ~~~ Cris Harrison