These pitot tubes are a straight replacement for the plastic items in your kit. They are made from turned brass and are exquisite and a huge improvement over the plastic that comes with the kit you have.
There’s a one page instruction sheet with an image of where they go (both wings) and they should be a straight fit. If you do need to drill a hole to fit them it tells you that you need a 0.7mm hole. Fix in place with cyanoacrylate.
A highly recommended and simple update to your next build.
Many thanks to Master Modeler for the review sample.