You bought a pack of 2 drivers, so you received:

A fully equipped PCB, FluidNC software already loaded and board tested on my K40

You will need to install and configure lightburn: Link to post

Then follow the assembly instructions to the letter in the article (installation part in the K40): Link to post

Take the time to follow each of these steps to make sure you don’t damage your machine or the shield!

In case of issue, please read first the troubleshooting post : Link to post
And to the upgrade your shield one : Link to post

Thank you again!

Avataar120
Discord: Avataar120#7932