you aren’t putting a 3.5in in that slimline bay. you can probably rig something to hold one there, though. that’s where the get ‘‘creative’’ part comes in.

you also have the 2x2.5in at the bottom but you’re missing the rails or caddies for them. should be like 5-6 bucks each or so on ebay or azn. don’t bother with those, though, unless you’re putting in hdd there. sata ssd can just be stuffed in the cage, they ain’t going anywhere.

be careful with whatever mb->sata power cables you have. make sure they’re the correct ones, as they aren’t all the same. you could get away with a 1->2 sata power splitter once on each mb power connection, as the output of each is designed for 2x3.5in hdd anyway.