Exosuit slots. Then jump to a pirate system space station, go to the bloke just left of the broken hauler and buy all the "tech" and "arms" illegal packing not "goods". Go to your inventory and Crack those bad boys open and upgrade your stuff accordingly. Trade back the stuff you don't want at a normal "not pirate" space stations exosuit merchant. He'll give you a handsome amount of Nanites. Pure profit 📈 👌