Why does the Torah insert the word "Yerech" in connection with "Tzafonah"?
Ramban: To teach that (if the thigh of the Mizbe'ach is on the north, then the front of the Mizbe'ach - the Kevesh (ramp) is on its south side. 1
As the Torah indicates in 6:7 (Ramban).
Why must the Shechitah of Kodshei Kodshim take place on the north side of the Azarah?
Why does the Torah add the words "Tzafonah 'Lifnei Hashem"'?
Rashi: To teach 'Tzafonah Lifnei Hashem, but Tzafon does not apply on a Bamah. 1
Why does the Torah mention Tzafon regarding a Seh, but not regarding cattle?
Moshav Zekenim, citing Tana d'Vei Eliyahu: The ram [offered in place] of Yitzchak is Olas Tzafon. Its ashes are Tzafun (hidden) in front of Hashem for an eternal remembrance (He considers as if Yitzchak was offered, and they are his ashes.)