If it is anything like normal, you can get the screw in place with a few minutes of careful manipulation.
One thing to try that rarely works, but is worth a try, is to pretend it is one of those "get the stringed ball in the hoop" games. Put the screw in the grip, and strategically shake it to line the screw up.
Or, with the grip off the rifle, get the screw in, then hold it in place with the screwdriver until you can line it up with the lower.
Or get a pair of long tweezers, or needle nose pliers. Get it started that way.
I'm in Houston or I'd help you.... But if you mess around with it for a while, you'll get it on. I take my grips on and off fairly often, and I have never needed one.
Once the screw is aligned, it is a simple task to get the detent and spring back into their slot so the safety works. And, if that's too much trouble... Does anyone ever really need a safety?
PS: I just made a poor quality video to show you.... I'm uploading it now.