Alpha Carinae V was the homeworld of the Drella. It was the fifth planet in the Canopus planetary system. This was one of three planets in this system that supported life; the others were Alpha Carinae II and Alpha Carinae III. (TOS: "Wolf in the Fold"; TAS: "The Eye of the Beholder")
The Alpha Carinae system was located in the Alpha Quadrant. (Star Trek VI: The Undiscovered Country, production art)
The location of Alpha Carinae and Canopus III on "The Explored Galaxy" wall chart
The location of Alpha Carinae on the tactical situation monitor
"The Explored Galaxy" was a map of charted space in the Alpha Quadrant. The Alpha Carinae system was located between the Tholian Assembly and Romulus. Both locations were identified in DS9: "The Search, Part II", "Call to Arms" as being located in the Alpha Quadrant. This chart, first seen chronologically in Star Trek VI: The Undiscovered Country, was also seen in several Star Trek: The Next Generation and Star Trek: Deep Space Nine episodes set in the 24th century, from the year 2364 to 2370. These were TNG: "Conspiracy", "The Measure Of A Man", "The Emissary", "The Mind's Eye", "The Game", and DS9: "In the Hands of the Prophets", "Cardassians".