How to display custom attributes on new page

This should be simple but I am stumped. Searched around a whole lot for an example but …

I have several custom attributes defined. I can display them on the detail event page just fine. What I mean is that when you look at the event page you see the attributes.

What I am trying to do is to add some of those attributes to a calendar display on another page. I have setup a short code like this:
[events_list_grouped mode="monthly" country="US"]#_EVENTLINK - #_EVENTDATES at #_EVENTTIMES<br />[/events_list_grouped]

That works great but I cannot find a way to add a #_ATT(nameofattribute) to that list.
Any help appreciated.

https://www.ads-software.com/plugins/events-manager/