IE shifter collar. Why?

[JMinPDX]

As I’m buttoning up my 5 speed swap and installing a new leather shifter boot. I’m wondering what the collar on the shifter in the picture below is for? 

It came with the IE kit I bought from a forum member. It’s got a 4mm allen screw to hold it in place. No mention of it in the IE instructions but it’s in a photo of the shifter plate mounted on the trans. Don’t know what purpose it serves for or where to install it. I’m leaning toward not using it at all.
 

Photo from the IE instructions:

Edited July 16, 2023 by JMinPDX

[2002iii]

It's a weight, that you can move up or down to change the feel of the shifter.

 

Some newer BMW's have ones with rubber in them to dampen vibrations.