Elyazid:
I do not know if that will really matter at this point, plus your low V score (and overall low score) will do more harm than good. Can you even submit a score way after the deadilne? My guess is not?
Also, how did you respond to your interviewer's question about your quant skills in real-time?
There are other ways to demonstrate your quant skills. You could take a separate course (though the effectiveness of this strategy is highly in question), you can have your recommenders speak to this in their letters or supplemental letters, and you can put together a write-up on some quantitative work you have completed in your job or elsewhere, if appropriate.
Overall, I think you should just sit back and see what happens. If you are waitlisted, you can reach back out and consider options for improving your chances assuming your quant skills are even the factor that holds you back.