How to change "Stocked At" Locations

While trying to dropship from Zen Drop I’ve run into a problem, every item i list is “Sold Out” and i looked in the “Bulk Edit” of the variants from the products, and the “Stocked At” locations Zen Drop isn’t available and i need to somehow add it or update it so that the stock is updated and available on website. As you can see in the photo it says i have “50000” stocked but the locations for “Stocked At” Zen Drop isn’t there I really need the help. Thank You - Clinkers

Oh yes please, i thank you very much for hitting me back up, what do you think is happening off of your own experience ?