Help electrical part identification

Top photo the blue thing is the dreaded/ hated 74 only seat belt interlock system. If you wander over to MyMopar and look at the service literature "Master Tech" stuff there's an article on that

MyMopar - Mopar Forums & Information - Chrysler Master Tech Service Conference Library

You need to disable that mess, which can lock out the starter. Look in the engine bay usually on the left fender apron, for a horn relay sized box with a (used to be red) reset button. Permanently jumper the two "yellowish" wires together These wires are the start relay trigger power coming from the ignition switch

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If you have a factory shop manual, and you NEED to get one (reprint, CD, etc) there is a chart to rear of schematic wiring diagrams which shows each component/ location/ connector layout

The cylindrical object in post 3 is the delay relay for the key in light