Purity: Orientation During Salat al‑Mayyit
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 586:
The person who performs salat al‑mayyit must face qibla. It is also obligatory to place the corpse in a way that it lies on its back in front of the person performing the prayer with its head on the person’s right-hand side and its feet on his left.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)