Obtain the required components outlined in the"Tools" & "Relevant Parts" of this How-To

Remove the side panel (between the X & Z Tower) from your Rostock Max v2

Download and print the required drill template. (You will need to ensure in the print settings that there is no scaling being applied.)

Install AstroPrint or OctoPrint on the Raspberry Pi. Here is a tutorial on installing and setting up AstroPrint.