Here is an example of installation on the Epax X1. Check below for more info specific to your printer and to download PDF instructions.
Since you are adding about 2.6 mm to the bottom of your build plate you may need to adjust your Z stop. Some build plates have enough play in the leveling screws to absorb this, but on some, you may need to physically move your Z Stop Sensor or tripper plate to account for this extra distance, each machine is different. Below you will find a list of printable Z stop sensor extensions and a list of confirmed machines that only need a re-level your build plate. Be sure after installing a new Z stop sensor extension to re-level your build plate!
Locate the screws identified in the picture and loosen them enough to slide the metal plate down 2.6 mm so that it will trigger the optical sensor sooner to give enough room for the installed kit. Then relevel the build plate and you are good to go!