Varia notification/vibration

I have the following setup:

Forerunner 955, Edge 1040 and Varia RTL 515.
The Forerunner is set as PTD.
Now, while cycling, I want to receive vibrations from the Varia on the Forerunner without having to start an activity on both the 1040 and the Forerunner. (I don't hear the sound signals of the 1040 in traffic)
Is there a possibility or work-around to achieve that? And if not, which of the 2 files is best to delete in Connect after the bike ride to keep the most data?

Thanks in advance!
(Posted in the Forerunner 955 and Edge 1040 forum)