Question about Side Lever top arm correct execution

Hello guys, i just have i few questions about side lever.

 

Do u depress your top shoulder or Arm when performing side lever? like pulling.  Or u just relax it?

Some says your top arm should always be pulling. But in Beastskills.com Human Flag tutorial it says "Despite what it may look like, the top arm really doesn't do much. It DOESN'T pull you up horizontal. Just keep the arm straight and hold on tight." 

 

 

I don't want to endure myself by experimenting different executions like i did a year ago. 

Btw here's the pic: 

 

Left side picture = Top arm/shoulder is depress (pulling)
Right side picture = Relaxed Top arm. It's like elevated 

As far as I know top shoulder should depress while bottom shoulder should elevate

Yes, it should be pulling. You might be able to sort of wedge yourself in there if you just hang on with it rather than actively pulling, but you're not going to move anywhere.