Electronic system assembly

A system, comprising:

• a device including:
• a plurality of first circuit boards including a plurality of electronic components provided on first surfaces of the plurality of first circuit boards;
• a second circuit board including a set of first connectors on a second surface;
• and
• a third circuit board including a set of second connectors on a third surface,
• wherein:
• the first surfaces, a fourth surface of the second circuit board opposite to the second surface, and a fifth surface of the third circuit board opposite to the third surface define a cavity containing the plurality of electronic components, and
• the set of first connectors and the set of second connectors are electrically coupled to the plurality of electronic components;
• and
• a first subsystem including:
• a set of third connectors engaged with the set of first connectors;
• a power source electrically coupled to the plurality of electronic components via the set of third connectors;
• a set of fourth connectors engaged with the set of second connectors;
• and
• a plurality of electrical loads electrically coupled to the plurality of electronic components via the set of fourth connectors, wherein operation of the plurality of electrical loads is based on operation of the plurality of electronic components.