Watch the Even Funkier In D! online guitar lesson by John Goldsby from Upright Bass Handbook
This lesson focuses on Example 2-6 at a faster tempo. The shift from the note B with your 4th finger to the note C with your 1st finger is crucial. Practice this shift over and over. Once you feel like you can make the shift precisely, and in time, then try the basslines with the playalong track.