The dotted part that sort of dead ends is in the "squeeze" ... at the time we weren't sure whether and how this way would go so we backed off and then located the ring-pin variation. We plan to go that way next time.
Here's another view of the last 3/5ths of the 5th class section. Dotted lines indicate the actual route is hidden by features of the ridge. Bill Lawry's photo and comments describe this route well.