Cad map to Rhino7

I’m new to Rhino :slight_smile: I’ve imported a dwg Cad map (contour lines, buildings, roads and water) to Rhino7. When I imported it, I found that the contour lines were separated from the rest of the map and had the right shape (which is good). However, I’ve tried to ‘stick’ the map to the contour lines so I would have the buildings on the contours etc… but it didn’t work. I used the Patch command (not sure that’s the one I should have used…). Could you please help ? Thanks