Fixing Anchors for Pergola

[canalsiderenovation]

This is the second patio area which will be flagged in porcelain by the end of the week (ignore the height all our levels need sorting on the garden) - it was originally the old septic tank area which is why it's larger than we really wanted.

 

 

Anyway, I digress. We have bought this https://www.costco.co.uk/Garden-Sheds-Patio/Garden-Structures/Gazebos-Pergolas-Conservatories/Paragon-Modena-12ft-x-16ft-36-x-48m-Aluminium-Pergola-with-Canopy/p/1321630

 

The builders have the template of where the legs will go and will reinforce under the porcelain (it will be on the middle and there will be a good gap either side of it). My question is, anything in particular we need to drill through the porcelain?

 

The pergola comes with the concrete bolts - are these suitable for going through the porcelain?