Just stumbled on this post on EpicCare. Thought it might be useful repost the link here.
You will need EpicCare credentials to view it.
https://epicorcs.service-now.com/kb_view.do?sysparm_article=KB0030140
In short it lists all the SQL tables that related to BAQs and dashboards.
Might not be of value for all, but thought it was worth a post, if not just to highlight some of the information that Epicor is making available to their Customer base.