I can't make anything out of the first one, either. Maybe it's a separate code that the Empire uses? In the second one, I can make out (at least what appear to be) a Y, a U, and an H, giving us "_ Y _ - U H _", which seems to be gibberish. The mystery deepens...
What I'm more interested in is the other writing on the plans, which seems to be cursive English, albeit hard to read. Above the Aethermeter, it reads: "it appears that this device has some relation(?) to the command(?) aetherlight" Surrounding that gauntlet, we have "a gauntlet to wear on your left hand...for controlling(?) aether..." and I can't make out the phrase at the fingertips.