The template definition, ODTC_Location, is one track that allows you to “snap” it to the deck and adjust the associated plate site according to your off-deck handoff. Each track on a deck is 22.5mm so the template must be in increments of that to be able to snap (note that 6 track carriers are 135mm wide).
You would then add the ODTC_Site rack to the plate site so you can “snap” it to the plate site.
And the plate site associated with the template also accepts the labware that you intend to use. The plate site is defined as 127x86 so your labware must be defined with those dimensions as well.
See this recent post that provides more insight on this approach with templates: