I had to fill in the map by hand, but it made all the difference.
These next two were connected before, but to complete the path (going up from 13):
13 (Moses Fleetwood Walker) and B (Cadillac Fleetwood)
B (Cadillac Fleetwood) and N (Mick Fleetwood)
...but this one should be new (to finish the connection):
N (Mick Fleetwood) should tie to K (Who's Magic Bus) (both musicians or bands)