Need help on a isometry drawing

Hello, i started as a metal worker this summer now in school we need to make isometry drawings, and I don't know how to draw a hole I made 2 examples, which one would be the right way 1or 2? Thanks

Hello, i started as a metal worker this summer now in school we need to make isometry drawings, and I don't know how to draw a hole I made 2 examples, which one would be the right way 1or 2? Thanks