I really don't think that way, in terms of "connector holes" Hey, I try to make all of them good, and I have only heard on gca ever say, "Well, they can't all be good!" If you start with that attitude, they most certainly won't.
Fewer of you will have played the Quarry than Bandon Dunes, but to give a similar example, two of my favorite holes there - the short 6th and 9th - might be termed connectors, if so inclined. After the property was "shrunk" from both sides of the road to basically one, with only two holes to the east, the holes had to tighten up.
The very first hole I had my heart set on was the 8th. I knew it would take the entire property to make 16 holes and the range fit and laid out 1-5 along perimeters with nice effect. In earlier routings, I had avoided both the ridge top on 6 and the narrow valley on 9 as being too difficult. Forced to look at the property slightly differently, and having recently played Sand Hills and its ridge running second, made me consider 6 differently. Having played in Ireland, and seeing forced carries over dunes helped both on the tee shot there, and in placing hole 9, where the approach is through what used to be a haul road to a cement plant. Its narrow, but it seems to have worked.
Hole 7 then had to play over the old sand quarry at 90 degrees, rather than the angle I had originally planned, causing a direct forced carry, which some complain about.
I would consider neither hole a connector, even though they may have started out that way. They definitely were worked out as a result of me wanting the 8th hole in its exact location.