Okay, can you help me understand your setup? Maybe a sketch or photo?
Up to 24 cables coming in the back, at the top most U and punched down at the front?
Are the cables coming in the back? Sides? Both?
Something like this, mounted on the inside of the back legs (facing in or out depending on you setup might help.
StarTech.com Horizontal 1U Server Rack Cable Management https://www.amazon.com/dp/B073X4PLG9