How to Unlock Arcane Slot on A Warframe

There is no arcane slot visible in the Arsenal for Secondary Weapons unless you have at least 1 adapter in your inventory Alas, I've never

To give context Arcane Slots for Primary and Secondaries only get unlocked after Steel Path and now we have the stuff related to it get unlocked

warframe how to unlock weapon arcane slot If you go to your marketplace and you search for war frame slots, you can see here that you can purchase a slot for 20 Platinum right there But if you don't

warframe complete starter slot bundle If you isn't going to continue to expand the selection and weapon categories for Zaw parts, would it be at least possible to add an