My guy, I believe the enemy already knows about our WWII-era "large truck" technology. It's fine.

You don't want either of those things in a widely used military vehicle. Soldiers do not need to die because they're fumbling and dropping keys under fire. They also don't need their truck dying in the middle of a maneuver because the kill switch accidentally went off.

Also, in war, trucks will be getting destroyed left and right. It'll literally be a rounding error.