If the original question was to do with one side of the saddles being vertical and the other angled, and which way round they go, then the answer is whichever way gives you best intonation. Look on any guitar and you'll see the bass strings are longer than the treble strings. You will get maximum adjustment on the treble strings if the vertical face points towards the tuners, and maximum adjustment on the bass strings if the vertical face is away from the tuners. The middle string saddle positions are mainly a matter of appearance.

Of course, before doing any serious intonation checks the nut must be correctly set and you should be using new strings.

Happy plonks.