In regular notation, left hand fingering is usually not written down, unless a particular fingering is required or recommended. Nevertheless, these two videos show the fingering, as an example, of the first part of the first tune. The general principles explained here are applicable to all of the solos; this is just an example.

Principles:
- four fingers cover four frets, or five to six with small excursions: one fret up and one down
- scale patterns are at the core, so follow typical scale fingering as your first approach.

If in doubt, use the fingering that is most comfortable for you to play, keeping the scale fingerings in mind.

(see also the Jazz Guitar Basics Course for scale exercises)