What is the effect of a missing screw fitting clutch-kit to flywheel?

What is the effect of a missing screw fitting clutch-kit to flywheel?
Actually in my Linea T-Jet, I had to change (replace) it's clutch kit and actuator (I.e. a single unit consisting clutch bearing and slave cylinder). On refitting every thing and remounting the gearbox as usual, it was found that he fitted only 8 screws and missed 1 while mounting and fixing clutch kit cover on the flywheel! To fit this 1 screw again the whole labour of removing the gearbox and refitting it is required which is very strained and painstaking job again. Mass of the screw is just 7.00 gm.
The car is running normal and seems no issue at present.
If I let go that 1 screw, then What is the effect of a missing screw fitting clutch-kit to flywheel?
Please guide me.
Navin Talati / 09-02-2020

 

Mass of the screw is not relevant but the purpose of fastening it serves sure is. Nothing imminent will happen because of a screw less but you should know that these parts are subject to cyclic loads and uneven fastening will lead to additional stresses on the remaining bolts and may lead to premature failure (or you may even wear this set of clutch before anything happens). The manufacturer always design the assembly with a factor of safety hence no imminent failure will occur. But if I were you, I'd rather get it done and check that all the nuts/bolts are torqued to the correct spec just for the sake of peace of mind.