[Unsolved] Upgrading Armor- specific units

Hello Hive Community. I present to you yet another problem I have reached during the developement of my map- specific unit upgrades. Currently, I am attempting to make an upgrade with some resemblance to the "iron plating" upgrade. However, I only wish for this to apply to two specific units (mechanical). Does anyone know how to accomplish this?

If you do have information regarding this topic please post, and in either situation thank you for reading .

You should create different upgrades for those two units and for all other. So if only that 2 units will be be able to be improved with tris upgrade, other player units won't be influenced by it.

just put the upgrade where the units upgrades are
Techtree - Upgrades Used

I meant the same thing. You should create an upgrades you need for that 2 units and to put them into Techtree - Upgrades Used.