Do you mean how do you stand on the red part? If that's your question, Lancer would be my only answer because it can jump.

But why the hell would you want to be there? Zero cover and literally every chance to get flanked. And hands down my AresArcs would melt any mech stupid enough to stand out there. ParaDisc's would also completely ruin someone day if they were trying to be a clown. Those hook shots are infinitely better than javs if used right.

I saw someone hiding there by Area and keep on flanking my team with javelin. So there must be some way to get there or that's a freaking hacker.

I've tried - you can too in "Custom Match" where you do not invite any players aside from yourself. On that stage that point is mostly inaccessible unless there is a glitch, you just slide off and fall into the ocean. Maybe there are glitches with consistently making your mech run forward or some single step or pixel hacks. But I've been all over that area (without battle) with the Lancer mech to see where you can jump into and and how to scale jump to higher crates, I've slid off the side every time without fail.