as u see , the screws are close to each other,,so i can gain stance width..
i'm 6'3 on a 162 ,and i feel i want more width so i did it.
is that bad for the bindings? or willl the screws get loose ? or will it effect my riding?
I wouldn't do that. Your screws are no longer evenly distributed around the center of the baseplate. The entire right side of that binding has nothing to anchor it to the board. The board-binding connection is where a lot of large mechianical shearing, torquing, and leverage forces occur.
You may be fine now; but after repeated stress, stretching, pulling, and twisting god only knows what could happen to that disc.
They're your legs though, do what you want.
"Never attribute to malice that which can be adequately explained by stupidity."
I did something similar before on my Ride Delta Mvmnt. They have aluminum base plate. But I didn't put the screws next to each other like that though. It might not be a good idea since you have plastic plates. I would still use the standard screw pattern and just shift the bindings on each side. You can still squeeze about 1/2 inch on each binding.