Ink names and placement?

I’m installing a carbon inkset in my 4900 printer and find the labels on the inks I received confusing. I received Neutral Shade 1 and Warm Neutral shade 1 bottles but find no reference as to which goes in which cart (PK and MK carts). I’m using the ink set for both prints and DN. Second question - if I’m only using the printer for matte prints and DN should I still load GO in the LLK cart or leave it with Flush?

Neutral Shade 1 is Matte Black; Warm-Neutral Shade 1 is Photo Black. My W-N Shade 1 bottle is labeled Photo Black, but the Neutral Shade 1 is just labeled Neutral Shade 1. Go figure.

Thank you, you’ve answered my question!