Secondary location devices speaking with primary location devices

I’ve got two locations. each location has:

  • Buttons
    *virtual switches

When a button is pressed, it activates a virtual switch and changes its state.
That change of state is then sent to IFTTT which sends me a notification.

IFTTT will only send notifications from one smartthings location.

How can i get a button press from my secondary location, to turn on a switch in my primary location?

Does anyone have experience with this?