Do what you can, hope for the best, enjoy the show, laugh if it doesn't work out.
See if you can get the PCM-M10 mics into open air. Put a tissue in your shirt pocket to raise up the recorder, whatever. The higher in the air, the better.
Make sure you are switched to Manual level, not Auto.
Make sure the Limiter is on in Menu/Detail Menu.
Menu/REC MODE at 48/24.
REC LEVEL (the knob) at 3 to start.
If you can look at the level lights, you want it to be blinking now and then with green. Maybe there's an opening act and you can turn the REC LEVEL to do that.