Thanks,I reassembled the case and it works...the only problem is creating a start button but it is known for this case, it has a wobbly start button...I think he's more concerned about the resistor.
Looks like an unused resistor that may have been left in or fell into the case. It didn't fall out of anything because it still has it's legs which are cut off once soldered onto the PCB. Or, they forgot to solder it in place which I find unlikely.
I wouldn't worry about it unless something at the top panel doesn't work.
I bought a Thermaltake case in 2018 and they messed up on the top panel. Miss wired the power switch/LED. I sent them an email and they sent me a replacement top panel/pod/PCB for free and no shipping. Took about two weeks total.