[Guide] Spice up your rack with these stylish & sexy chassis for your pfSense build!

I grabbed 2 of the Onesign OS201’s from eBay and got them last night. I realize now I didn’t get a shot of the the front but @adamsir2 posted it above. Just thought I would post up some extra internal shots and ask about mounting. Will I be able to mount this directly to my rack? It appears to be missing part of the rails. The weight isn’t too bad but what is the best thing to do? Picture below shows how they came, pretty sure it’s not the entire mounting rail, but is it enough?

Some extra pics for fun.