C. F. Keil and Franz Delitzsch on 2 Chronicles 11:15

2Ch 11:15

And had ordained him priests for the high places. ויּעמד־לו is a continuation of הזניחם כּי, 2Ch 11:14. בּמות are the places of worship which were erected by Jeroboam for the image-worship, called in 1Ki 12:31 בּמות בּית; see on that passage. The gods worshipped in these houses in high places the author of the Chronicle calls שׂעירים from their nature, and עגלים from their form. The word שׂעירים is taken from Lev 17:7, and signifies demons, so named from the Egyptian idolatry, in which the worship of goats, of Pan (Mendes), who was always represented in the form of a goat, occupied a prominent place; see on Lev 17:7. For further details as to the עגלים, see on 1Ki 12:28.