just for ur curiosity.

let me explain since no one bother answering my question.

either you need a very long philips head screwdriver (MORE THAN 20CM long)
or a size 10 spanner.

theres 2 way you can do this.;

1. Do it from the top. there should be a writing next to the HEADLIGHT inside the egine bay. theres should be 2 arrows drawn, one states R-L and U-D. you can just slide the screwdriver to the specific hole and folow the arrow of direction.

2. Do it from under the guards, when u open the plastic guard. you can see clearly a 10mm size bolt stuck just behind the headlight housing. use the spanner and turn that to adjust UP n Down only. i find this faster than NO.1

n yeah, u cant adjust right n left from the bottom. so thats all.