Tach and speed signal connections in 355s and 328s

I was wondering, on the back of the 355 dials what type of connector does it use to revieve the information? (and similarly with 328s)

Are dials from one swapable to the other with custom mounts made? (connectors same, signal the same)

I am assuming an aftermarket ECU will allow this to work.

I was thinking of making a custom housing, then indivlually wiring in the parking brake and brake failure lights to seperate lightup dash lights, (which would be added) and then convert the 355 green to orange and use them as my dials in my car. (and some how fix the redline etc etc. It seems like a fun project, and is completely reversable w/out modification etc etc
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