NZXT M59 - Manual (Page 15)

NZXT. 13
Wire routing and CPU fan bracket removal
The M59 is designed to allow for optimal airflow and wire
management inside the chassis, please follow the guidelines below
on how to use the features.
1. Route PSU cables through the bottom opening and use the
punched holes to tie any loose cables
2. Remove heat sinks easily through the CPU punch-out on the
motherboard tray