I hesitate to come to any firm conclusions about this inscription. It's hard to tell how damaged it may be, and the red paint is probably not ancient.
At first glance, I'd say it looks like a Mithraic dedication. Mithraism, the religion of the Persian savior-god Mithra, was very popular among Roman legionaries stationed in such far-flung places. The (partial) name of Marcus Septimius (Μ/ΣΕΠΤ, last line) may indicate the person responsible for whatever was "built" (ΕΚΤΙΣΘΗ, third line) on that spot.
The two characters at the top may be Mithraic symbols (sun + musical instrument?). The "lords" (ΔΕΣΠΟΤΑΙΣ) of the second line may or may not be minor deities.
The Lion was one of the grades of initiation in Mithraism; this may be relevant to the "lion" (ΛΕΟΝΤΙ) of the first line, which seems to be preceded by a numeral.
The name Euploutinos in the genitive (ΕΥΠΛΟΥΤΙΝΟΥ) is hard to explain. He may be the builder of the edifice which M. Septimius restored; or it may belong to a personage whose statue, picture, or bust was "set up" (again, ΕΚΤΙΣΘΗ) there.
Sorry this all has to be so tentative, Binselam. But thanks for provoking our curiosity! It's an interesting inscription.