I'm trying to wallmount my Index basestations. It says they need to point to the middle of my playspace.

Does that mean the middle on the floor level (0m), the headset level (~1,70m-2m), or a middle beteen floor and base station level (e.g. 1m)?
(I also have FBT trackers, so they kinda need to be able to see my foot level, I assume.)