Uh oh!!

I wouldn't use grease.

Clean everything REALLY good.

Those threads are easy to cross.

Be real careful.

There is a factory torque spec, and the manual says if it does not get to spec, the control arm is junk.
That is most likely because it is cracked and could result in failure.

if it get to spec without being flush, then that's another problem.

It's your life (or the lives of those riding in your car).