Wow. Really nice job with clean cable management. Looks like you took some time with that.
The 8pin power looks fine to me. It is in there straight with what looks to be a good seat in the connection.
The only question I have is the fan header the rear fan is in. I can't see I that is the CPU fan or if there is another close to the socket. You just want to be sure you are plugging your CPU cooler fan(s) into the CPU fan header.