Ideally you want your guide rollers to be as wide as possible without interfering with the teeth of the blade. To that end, you can shoot to have the guide roller stop short of the gullet between the teeth. Unless of course your guide rollers are designed to accommodate the teeth. You can see on mine that there are cutouts in the guide rollers to allow running various width blades, including blades that are thinner than the guide rollers, without interfering with the teeth.
If, for whatever reason, it's not possible to get rollers that wide, you should bias the rollers as far toward the cutting edge as possible without interfering with the teeth.