E-bodies are the only car I can think of that never used one, actually. None of the B-body Rallye clusters did to my knowledge, but there was something similar in my '72 Satellite with the standard cluster, also not-so-affectionately referred to as the "turd dash" by my friends and I. On the F & M-bodies, as I recall, a similar connector is actually built into the circuit board, and the cluster itself plugs into it when it's placed in the dash.