No constant line voltage for Shelly 1. How do I wire it?

I am very new to using the Shelly relays. I have installed 1 Shelly 1 and it is working well. I was attempting to integrate a second Shelly 1 into this wiring diagram. In reviewing the provided connection diagrams they all appeared to need a constant line voltage. I could not figure out how that would work with this (see diagram). Is it even possible?

Hello,

Thank you for your reply. I actually did that exact example. The problem is I don't have access to a constant line voltage at either the switch near the load (light) nor at the light itself. See the arrow. If I try to place the shelly 1 in the electrical box nearest the load or the box containing the light itself there is no access to a constant line voltage. Is this correct?

Hello,

I am afraid changing out the switches for buttons is not an option for this situation. Thanks for the thought, though.