They are locked until you find them. When you find upgrades, you can attach them to your ship, but, you need to have every other upgrade attached before using the elite one. Simply go to your ship’s cabin and approach ship’s model. You can upgrade it from there. Be sure to have enough materials needed for upgrading.
How do I equipped upgrades, specifically the elite ship upgrades.
They are locked until you find them. When you find upgrades, you can attach them to your ship, but, you need to have every other upgrade attached before using the elite one. Simply go to your ship’s cabin and approach ship’s model. You can upgrade it from there. Be sure to have enough materials needed for upgrading.