Please direct us to the source for specific "panel mounting screws". I'm having a hard time locating a supply.....
Don't get me wrong, whatever screws you find on the floor are the right ones to mount the panel in my opinion, I'm just debating because stirring the pot is entertaining.
Drywall screws can't be appropriate for mounting a panel, because their appropriate use is mounting drywall.
Sheet metal screws aren't appropriate to fasten a panel to a wood stud, because they are designed to screw into metal.
Roofing nails would not be appropriate because they are designed to fasten shingles to wood, not a panel.
Any other non-specific use structural screw or nail designed to be driven into wood and have an acceptable sheer rating to support the weight of the panel would be appropriate and satisfy the manufacturers installation directions.
Thank you for coming to my Ted Talk.