Problem with SpotElevation.Bypoint

Dear Dynamo Specialists,

I have a problem with to add SpotElevation with the node SpotElevation.Bypoint.
I would like to add the spot elevation to a view for a wooden window part.
image

I have to add the spot elevation to a special place of the wood, see the number 1,2,3.

What do I have to do to fix it?

Thanks in Advance!!