Wiring up three switches for lights to Sonoff Basic R2

Hello all,

Just wondering if I have got this right. I have a set of three switches which currently turn on some lights and I would like to add in a Sonoff Basic R2 DIY


This is what I believe is the current wiring and below is how I think I can add in the Sonoff but wonder if anyone else has attempted this?

Kindest regards

Here is the sonoff addition I believe