1)
Why was the Mizbe'ach ha'Zahav placed specifically in front of the Aron?
1.
Targum Yonasan: It represented the Chachamim who study Torah, and whose aroma is pleasant like that of the Ketores
2)
What is the significance of the screen at the entrance of the Heichal?
1.
Targum Yonasan: The screen symbolized the Tzadikim, who protect the world with their merits.