Check this out:

ibb.co/LkccK1z (adding bolts in 1:35 scale)

I am cleaning up a 1:35 Trumpeter Swedish stridsvagn 103 C main battle tank. 🙂

I want to point out that, unless one is very careful, not only marking the hole before drilling, and then drilling at the mark properly, the efforts will bite you in the ass if the bolts don't end up looking symmetrical in placement.

In this case, the bolts actually runs through the plastic with the pin, so bolthead is fused with the pin, and I used a 0.6 mm drill bit to make the hole. Using the tip of a sharp blade to make a mark. The room lighting can be deceiving, if casing shadows on already placed holes, causing some confusion as to where the other holes actually are.