It was super confusing to me how to go about this. I looked up several YT video guides, but all of them glossed over this part, but I finally figured it out.
(a) The trick to finding out, is to play Destiny 2 while the focused activity is active, and it will all make better sense.
(b) To find out when the focused activity is active, go to the tower map, and hover cursor over the top-most icon. It will either say how long until the activity starts, or how much time is left in the current one.
When not active:
When active, BEFORE pledging:
(c) While the event is active, choose which class (hunter, titan, warlock) you wish to “pledge” to devote to the cause; it doesn’t look like you can change which class you wish to pledge with after pledging, so choose wisely.
(d) In order to pledge, you must play the “focused activity” with the guardian of that class. There is a symbol that looks like a { pointed open-end up, below one of the four activities; the example below shows the { to indicate which is focused.
(e) After you played it (to completion? I did.), viewing the point at the top will indicate you are pledged:
(f) Now, play that activity over and over, to ensure that the class you chose earns the most points in that activity will win after the countdown clock completes. If you’re successful, you will receive a gray engram directly to your inventory, which you can then open. Inside the package is a full set of medals to bank for your class. Be sure to bank all of the medals you have before you open the package because you may lose some if you open the class win package before banking all those you’ve collected before opening it.
If you’re having trouble finding the engram, I had the same problem, every time I’ve gotten it. I simply restarted my game console, and restarted the game, and the “drop” sound played as soon as I got to orbit, and it was in my inventory then, without showing on the screen that it dropped. You also may need to speak with Eva, in order to open it. When I got my first one, I could hover over it but not open it, so I went around and banked things, talked to Eva, and eventually somehow it became openable finally.
Good luck!
the ablestmage press 