This routing appears to correspond to portions of today's Hurt Bridge Road from SR 20 north to Holbrook Road, and a portion of roadway curving northeast to just west of Matt, which does not appear to exist today. By 1966, the west-to-east portion of this connecting road had been extended another  further west, and was by then signed as SR 141, but did not yet connect to SR 20.
This route seems to align with parts of today's Hurt Bridge Road from SR 20 north to Holbrook Road, and a section curving northeast towards Matt, which doesn't exist now. By 1966, the west-to-east segment of this connecting road had been extended further west, becoming SR 141 but not yet linking with SR 20.