Agree with C12Friedman sleeving is most common and probably the best option, not just in PSUs but also in DCUs (driver console units) like this one https://www.qconnect.com.au/CustomCables/CustomProjects-456/
These are high quality standard, Australian Approval N18767 networking cables. Undoubtedly our best sellers here in Australia. https://www.qconnect.com.au/_products/CABLES+++ADAPTORS/NETWORK+CABLES/Cat6a+Patch+Lead-1085.aspx