Rallye cluster question

Hey everyone,
I've been working on getting my cluster back together (68 barracuda) after a long 3ish years. I've updated my tach ( RTE tach kit) and added a solid state limiter (RTE) .
I've posted a few pictures, does everything look correct as far as in proper order. I've had it apart so long not sure lol. Does anyone know if the condenser ( not sure if that's correct name)( circled in red) is needed, I'm running the original AM/FM radio..

Also can someone give some info on how to bench test lights and gauges if possible..
Electrical is one of my weaknesses...
Thanks in advance.

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