Is there a way to attach a line or point drawn on a plane onto a stl model

SketchUp
#1

Is there a way to attach a line or point drawn on a plane onto a stl model with many polygons?

#2

Yes. You need to give us a lot more information about what you are trying to do.

#3

capture-20210126-113450
capture-20210126-113450767×525 59.5 KB

Thank you for the reply.

I want to attach a sketch on the plane to the bottom model as shown.