For the well dressed classic build, custom length cables. Not sure who’s custom, but we describe each as overall length, controller or mobo connector, then inches of cable, connector ,repeat.
A length with ‘x’ has the ‘pc twist’, a connector with ‘r’ is on the back side of the cable. Also DIP connectors can be unindexed, or include ‘k’ (key and slot) or ‘p’ (plugged pin).