Yes, those M109's would belong to the 92nd division
Here's likely a picture of one of them (might not be, but i think it is)
Here are the coordinates for the supply yard: 32°36'43.16"N 51°38'4.23"E
If you, or anyone else, have any other coordinates for equipment like this on google earth, we should post them because they are invaluable for judging distribution of equipment.
What is the size of a "group" is it comparable to a battalion?
Also, do you know anything else about the Isfahan army contingent, it looks like they have a mechanized infantry brigade/battalion/other as well. There is also an IRGC armored contingent there as well as a commando/SF(or whatever word you might use to describe it) unit.