How to set a plate to a warehouse and location

Once in there, find the item class, and then you can search for the item on the right:

You can also filter this list by going to Item->Properties:

You can filter by anything here: (Note the filter will stay so remember to remove it)

Once you find the item, double click on it and go to the stock tab:

Next, click Modify and change all 3 locations to the correct Warehouse (Dropdown) and location (Text box to the right of the drop down)

Once done click save and then ok.