Power amps are usually placed at the bottom of the equipment rack.
Floor standing speakers, have their binding post at the bottom.
What droop?
If you have such a problem, on the Amp side, you may place a plate (Aluminum or wood), drill a hole at the edge (Prominent from back adje)
and connect a short rope around the cable and that hole.
I use #0 AWG cables and they are ok.
A 3 m long #0 AWG weights 1.85 kg. and on each channel there are two.
The cable is flexible and the partial weight is not an issue.