Those Boxers wouldn’t last two minutes against the Russians, as I said above, they are a waste of money, and obsolete before they hit the road.
If the Lithuanians are really interested in defense, and not in awarding contracts to pals, they would invest in survivable weapons systems and tactics. I can think of plenty of stuff I would stockpile to fight the Red Army, but APCs that get incinerated at the get-go wouldn’t make the list.
Anything they buy is better than the weapons system they don’t have.