Amazon Global Logistics (AGL) - help filing ISF form please?

Here is my situation (for my first Amazon Global Logistics shipment from China to the US):

-I own the goods; I've already paid for them

-I'm organizing the shipment through AGL and I'm the IOR (DDP, Amazon picks up and loads, delivers to Amazon DC)

-The shipment contains 2 SKUs, made by two different manufacturers. The goods are now consolidated at one manufacturer's warehouse

Based on the information provided, could you please let me know:

-who is the Shipper?

-who is the ISF Seller?

-for the ISF Manufacturer, is it ok to enter only the supplier where the consolidated goods are being picked up from?

I've been trying to get a clear answer but I get conflicting information. If you have experience with this, please help me! Thank you