Random, crazy thought, and only really half-serious - you know how we can transfer cargo from the SRV - what if we can transfer it to other things as well?
What if you can 'install' a UA into something already on a planet and it starts making Meta-Alloys?
Back to 'reality'...
Given the knowledge of a 'barnacle' scenario planet-side, that idea is total rubbish - we just need to keep plugging away scouring planets till someone gets the magic POI.
Assuming what we saw in the trailer is related to the Barnacles, there's an undeniable similarity with the markings on the UA, so I'll take a long punt and say they're definitely related somehow.
If we all just keep at it, someone will have a moment similar to when the first convoy was found - and we all know how rare they were!