Where to find the decryption key glyphs? (Mass Effect: Andromeda)

The glyphs should be different in rows
The glyphs should be different in the columns
Initially scan the area and find the glyphs on the monoliths around, then the terminal will be filled with question marks.
Then note the row or column that will be filled for three of the glyph. Enter in a free cell that is different from the other glyph.
Similarly, see below for terms and columns and pick up the missing.

Александр742
It Pro key in fact,I myself happened when scanning something as I understand it

Devault
in loot from enemies and containers

I am a trader-hangar for Aye buy one could.

Yes, what for do we need these keys? While nothing super-duper complex is not met.

Shadow_QZ
or so,they say that accidentally got))

Amar94
Develop Commercial enterprises out there and buy