Now you need a bead blasted matte finish buckle to match the case of the head.
I couldn’t find a decent 2 piece nylon strap to fit on my Precista COSC.
I was finding the deployant a little uncomfortable in the hot weather on my timefactors strap.
So I took the deployant off then marked the end that would take the buckle with a silver ink pen.
Then taking a broken Bergeon end I heated it up and made a whole in the strap gradually opening it until the pin fitted in,then smoothing the hole the same way.
Much as I had liked it on a NATO as someone pointed out to me I could lower the watch quite a bit with a 2 piece strap.
Not a major job but I am pleased how it turned out.
Now you need a bead blasted matte finish buckle to match the case of the head.
I have never managed to make a good job of new holes in nylon, yours looks excellent.