Hello @Promut-commercial
The drilling assistant always starts with a sketch. So if your piece is flat or round. All you have to do is create a plane that has the desired angle and have your drilling assistant work from the plan.
Depending on whether the depth is precise or not, the plan is made in a slightly different way. If there are several holes inclined but not at the same angle, there is still another way to do it.
Here are some examples made quickly in the absence of more information.
Kind regards
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