I moved my wood stove insert from one fireplace to another. I took the glass fireplace doors out of one and I am moving them to the other. When i took them out they were just nailed into the mortar through the brackets on the sides of the door frame. I was wondering how I should go about installing in the other fireplace? Can I just nail them into the mortar or do I need to drill into it to first? Any guidance would be helpful. THanks.