If the notes all go in the same direction, the slur should be on the note-head side, like this:
If the direction is mixed, the slur should go 'on the top', which might mean different note head side or stem side, depending on the direction of the first/last stem, like this:
If the notes all go in the same direction, the slur should be on the note-head side, like this:
If the direction is mixed, the slur should go 'on the top', which might mean different note head side or stem side, depending on the direction of the first/last stem, like this: