True. They mostly dropped bulkhead connectors in the 1980's as the number of wires greatly increased. In 1985+ GM trucks I've picked, the harness just routes thru a hole in the firewall. Ditto for my 1996 and 2002 Chryslers. My 1985 M-B is in-between. The wires feed thru the fuse box which is in the firewall. Later cars have separate engine and cabin fuse/relay boxes.
