Motec advice required (for beginner !)

I finally decided to start trying to learn something about Motec.
Looking online at the Youtube videos and websites I just got confused but I found a beginners guide called GTR2 MoTeC i2 Pro Beginners Guide that seems easier to understand.
I decided to start with a section called Brake Check which should help to see when the wheels lockup on braking.
Then I ran into my first problem, using Lazza's fine DAMplugin I notice I do not find Wheel Speed in the Motec Channels.
Can someone help point me in the right direction how to add Wheel Speed ?
There were templates provided in the release of the GTR2 MoTeC i2 Pro Beginners Guide but I can no longer find this online.

 

This is what I mean

 

You need to add these channel in the DAMPlugin.ini, see here https://forum.studio-397.com/index.php?threads/damplugin-for-rf2.49363/page-2#post-819448

Vehicle_1 = 2 (or 1 for normal precision)

Then you can do a math expression like this for example

 

Thanks for the answer Wergilius !
Will try this tonight

 

No luck, I added Vehicle_1 = 2 in DAMPlugin.ini , ran a few laps, opened the Motec file in Motec but I do not know do not know how to add a math expression (cannot find it on Google either) and where to do this.
As I mentioned in the title, Beginner, but thanks for the answer anyway

 

If you now have the channel, do something like this:



The this math channel will appear in the channel list

 

Thanks Wergilius, I see it now (with your kind help )
Will get onto this tomorrow.
Many thanks for your time !

 

Great, thanks Wergilius, succeeded in making the Front Slip, Rear Slip, Wheel Rot Speed (all four) now !
Now to figure out how to read it and what it means but I have finally made a start with your patient help !
(on checking my Melbourne setup with this, I expected to find the Eureka moment of bad brake bias but it seems my brake bias settings are fine ! )
Oh well, back to the book to look for the next part .