You have bought a 4 driver K40 shield, thanks !
You’ll have to install & configure Lightburn : link
If you have the v8.XX of the shield (see label on the shield), please follow carefully this article for installation guide : link
If you have the v7.XX of the shield (see label on the shield), please follow carefully this article for installation guide : link
If your K40 is not equipped with a motorized bed, it is absolutely necessary to deactivate the homing by following the instructions in the same article (Z-axis adjustment section)
WARNING: the 4-engine setup is a little special and requires little adaptation of the card configuration to your needs
In case of issue, please read first the troubleshooting post : Link to post
And to the upgrade your shield one : Link to post
Take the time to follow each of these steps to make sure you don’t damage your machine or the shield!
Thank you again!