Stockstadt mithraeum is not located at Saalsburg Kastell. Stockstadt is at least 30 Kilometers from Saalburg to the southeast. Stockstadt had its own fort (kastell) on the Limes. I wrote an article on Stockstadt fot Our Common Sun about ten years ago. I have been to Stockstadt and there is an excellent museum there.
Consider that there is a two-sided cult relief found at Mithraeum I of Stockstadt (CIMRM 1162) simal to this in Dieburg (CIMRM 1247)
Lit. Ingeborg Huld-Zetsche/ Klaus Jürgen Rau (2001), Das doppelseitige Kultbild aus dem Mithräum I von Stockstadt, Saalburg Jahrbuch 51, 13-36.
BSc Econ in Political Science and Intelligence Studies, born in Warsaw, PL, Researcher of Cults and Mysteries, a practicing Heathen since the age of 12.
The Mithraeum of Angers, excavated during a preventive operation and subsequently dismantled in 2010, yielded numerous objects, including coins, oil lamps, and a ceramic vessel bearing a votive inscription to the invincible god Mithras.
The Mithraic vase from Colonia Claudia Ara Agrippinensium in Germany includes Sol-Mithras between Cautes and Cautopates, as well as a serpent, a lion and seven stars.
Fragmentary sandstone relief from Rückingen showing a male figure walking right and holding a kantharos. Traces on the chest may indicate a torques or shoulder-cape.
In these two key passages, Justin Martyr interprets Mithraic rituals and myths as demonic parodies of Christ’s incarnation, the Eucharist, and biblical revelation.
Terracotta krater from the southern part of the Friedberg Mithraeum, discovered in 1849. The vessel is decorated in relief with serpents, a scorpion and a ladder-like motif.
In Letter 107 to Laeta, Jerome combines a pastoral reflection on conversion with an account of the urban prefect Gracchus, who ordered the destruction of a Mithraic cave in Rome, listing the seven grades of initiation associated with the cult.