Choke assembly installation

I purchased a new assembly for my Rancher 350 S because I noticed the plastic nut was broken.

I found this video for reference:

The problem I’m having is with the piece that goes inside the rubber boot. With it in, I can’t get enough cable even with the spring compressed to connect everything.

Do I really need that piece in the boot? I tried installing with out it and it works just fine, but I’m worried that this could damage the boot.

Any thoughts?