Inquiry about EP_Load in Demantra

If some dm_item_code are in t_src_sales_tmpl table but are not in t_src_item_tmpl table but these items are t_ep_item table, can we still use EP_LOAD to load the sales for the items? For example, we have one item A, which is in dm_item_code in t_src_sales_tmpl table with some sales history but this item A is not in dm_item_code in t_src_item_tmpl table. This item A is in item of t_ep_item table. Can we still use EP_Load to load the sales of this item A into Demantra sales_data table? If this is the case, do I still need to run load_item, load_location and load_sales all these three or do