Jet Engine Ignition & Starting: Interconnectors

A question was asked in a way that made me realize I have never discussed a little used but vital component of all of the older turbojet engines. Interconnectors are part of the design in can-type combustion sections, and in can-annular, so almost all jet engines up until about 1970 or so. There are some notable exceptions, and I want you to mention them in the comments. The engine could not run without these, but they are only functional during startup. While running, they do nothing.