It was designed to support a bigger, heavier satellite on top of it and serve as its rocket adapter.
2.
The " Orion 606 " SM design retained the 5-meter width for the attachments of the Orion SM with the Orion CM, but utilized a Soyuz-like service module design to allow Lockheed Martin to make the vehicle lighter in weight and permitting the attachment of the circular solar panels at the module's midpoints, instead of at the base near the spacecraft / rocket adapter, which might have subjected the panels to damage.
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