Step 1: The secret is in the shape
The top line is straight, as the bottom and flanks.
Remember the pattern is symmetrical (mirrored).
Few try might be required ;)
Step 2: The cut
I start from the top.
Be really careful, cutting paper can be dangerous and the cutter might rip off especially on this kind of shape.
Do it gently !
Keep both parts :)
Step 3: USB cable and and of the first phase
Phase 1 is complete.
It's usable as-is but as I use it for dev, thus touching the screen, I made a little improvement to make it more stable.
Step 4: Making it a bit more stable
Refine the edges to make it match the main stand shape and then tape it.
To finish, cut the bottom to make the cable go through.