Install keypad on stucco/concrete

I’m installing the lock keypad on the outside of my house and I am paranoid about drilling holes on the outside.

My house is stucco over concrete block. I assume I will use the wall anchors Wyze supplied. Can anyone confirm they are OK for concrete applications or are they just for drywall?

Anyone know what size hole to predrill for these anchors?

Would you use any silicon/caulk to make sure there is no water leakage into the drill site?

I don’t own a key pad but I’ve used these before on Stucco on concrete.