Neating/bundling wiring under solar panel array?

[SunnyNM]

I planted two sets of 2 7/8 inch oil field pipe - 4 poles with one set 10 to 12 feet south to north and 4 poles 8 to 10 feet south to north. Each set of poles has cross members with unistrut for mounting panels. Each set of poles has 8 panels mounted in two rows of 4 panels.
The first set of panels 2S4P and parallels into the second set of panels of 2S4P for 2S8P into a DC switch. Same thing for the other side of panels of 2S8P.
So that means positive and negative parallel wires running from panel to panel to the DC cutoff switch. Some of the cables are saggy. The panels are mounted high because horses and cows are naturally inquisitive and cows are especially not caring.
What method of neatening up the cables do you use?

 

[Rednecktek]

UV resistant zip ties are your friend. They're heavier duty and should last a good long time.

 

[LydMekk]

There is also metal hanger clips that you hang on the rails under the panels.
Can hang 2 cables on each on top of each other.
Works well - no plastic to disintegrate later ^^.
Amazon have them.