There are a couple of Sportwerks buggies, once you identify which one you purchased you can find the manual on the Horizon site.
I have owned several Sportwerks buggies, the Mayhem and Turmoil.
Both are decent rigs that can take some hard abuse. They fair well on a track once you get a feel for them but are not as “drivable” as current top end buggies.
Here’s an old video of mine, a Turmoil learning to fly…