This kit consists of a 24V 80mm fan, and an STL file for the drill jig for you to print. You will need pins an connectors to tie this fan into your wiring.
You can tie this in directly with the power supply, or somewhere on the Rambo board.
You WILL have to drill holes in your electronics side cover. This may require you to touch up your drilled holes with black of whatever method you choose as drilling will expose metal. Please do not do this around your printer, there will be metal shavings.