Project curves for laser engraving on laser cutouts

Hello GH community !

I’d like to put laser engraving for my laser cutouts in order to have the right engraving for the right cutout part.

These curves to all these laser cutouts parts:

I know I have to connect this somewhere but I don’t know where:

Site topo maquette.gh (840.5 KB)
https://we.tl/uT28sS0DWy