Can I place black fondant squares on white buttercream on the sides of the cake?

I want to make a checkered effect on the sides for a racing themed cake.
The woman does not want all fondant so I was going to make the black squares out of fandant and place them on the icing but I'm fearing they will slide off

Help please, all advice and suggestions are welcome!

Thank you!

Moisten the back od the fondant with a little water (use a damp paint brush) and apply to the BC.