Replacing Garmin FR70's broken wristband with NATO-style nylon strap

Garmin FR70's wristband is not detachable. So, when the wristband is broken, the watch has to be discarded  (see links below):
https://forums.garmin.com/forum/into-sports/running/running-archive/archived-forums/forerunner-50/5209-?4515-If-your-wrist-band-breaks-Garmin-says-just-go-buy-a-new-watch=
https://www.boards.ie/vbulletin/showthread.php?p=81344694

Garmin FR70 (top) and FR15 (bottom)

Garmin FR70 with broken wristband (top) and Nato watch strap (bottom)

Slip heatshrink tubes over the remnants of the original wristband. After shrinking the tubes, they can be further secured with black cable ties. Alternatively, attach the watch to the Nato strap with cable ties first, and then cover the cable ties and broken ends with heat-shrink tube afterward.

The idea of using a Nato strap to "rescue" a Garmin's broken wristband is not new. However, all the prior arts conveniently fed the Nato/velcro straps thru the remaining oblong holes.
http://www.eduardoramalho.com/2014/05/garmin-forerunner-110-band-replacement.html
https://www.mudandroutes.com/the-beasts-tip-of-the-week-repairing-a-garmin-110-watch-strap/
https://forums.garmin.com/filedata/fetch?id=1164991&d=1402255969


I didn't follow the prior arts because I predict the holes where the Nato straps are threaded thru will likely break in a short time.