As far as using elevator style harness loops I find that works fine with standard stranded wire.
My main control panel has six power pack circuits and 44 toggles with wires running from a 110 degree swing lift up panel to a 20" slide out terminal board.
All the looms are tie wrapped and flow down through the terminal strip board. Further descending down into a large 180 degree loop then ascending back up into the MTH terminal boards. Easy to service, no wire bind, no strain of terminals on either end.
Note the holes through which the looms run.