it should go at the very bottom in the right side of the fitting window, right under the “Drones” drop down list, it should display the same stats as the “Offense” for the combined m3/s of ore mined from lasers, strip miners, scoops, and drones, you can split them at least in two subcategories - drones and high power mods. so we know what happens with the mining when we switch mods, scripts, drones, etc.
Also on the left side under the numbers for the cargo hold and the drones, should be the displayed the numbers for the special cargo holds - like the one for the subsystems if the ship is a strategic cruiser, or the ore, minerals or other extra cargo holds that certain ships have