[Observium] SNMP sysLocation NeDi format

I found a post from 2014 showing the NeDi format works when using the Google API. I have tried a few different variations of it but under the location it shows a location for each device as the rack unit is different per device. Is this not supported and we should just do the physical location and not deal with the rack and rack unit or I am missing something?

I thought before I had used () or [] in the location and the map parsing still worked but I don't see that in the docs anywhere.

Thanks