Whereas the XP2 pad kits have a number of different installation instructions for the XP-510, 520, etc… compared to the XP-600, etc… the external waste ink kit installation is the same for all printers except the XP-510 so this video uses the white plastic XP-645 as it’s demo subject for visual ease of reference.
The Printer Potty kit shown in the video is, as ever available in two flavours, with and with the key as part of a bundle using the following links: