The rearmost plug (small red circle) is one of the engine drains, Since you drained all 3, you need to fill the sub trans and engine. Filling the engine also fills the DCT. Both the engine and DCT use the same dip stick and fill from the same opening. I'm pretty sure the 1000 Pioneer uses the same amount of oil as the Talon which is 6.1 qts. (when changing filters too) (6 qts. 3.2 oz). Note that some oil is trapped behind the oil filters, so even if you aren't replacing the filters, you should remove them to get a full drain, then add the 6 qts. 3.2 oz.
I use a 7" x 10" baking pan to catch the oil when I remove the filters, there's about 3 cups(?) caught in there.