...the left headlight isn't pointed as it should be. I see what seem to be two adjustment screws for pointing the headlamp up/down and right/left but the up/down screw seems to be stripped.

Any other way or ways to adjust headlight pointing beside those two screws? Does the T10 torx screw between the sidelight and the headlight control slew/pointing to some extent?

 

The screw in the corner light has nothing to do with adjusting the headlight.

To remove the corner light after removing the T10 screw, slide the rubber strip on the inside off the tabs, using your finger tips grab the inside corner and the back corner at the fender and pull straight out towards the front. May take a little pressure but it will pop out. Make sure the to line the tabs up with the grooves when reinstalling.

 

Also make sure the rubber grommet that is attached to the headlight and signal light assemblies is taken off. It can be reattached again. You can go to any auto parts store to get a universal headlight aiming kit or just the adjusting screw you need. The torx screw can be stripped very easily. What I did was go to a hardware store and get the same size screw in a phillips head so there's less chance of stripping. The headlight unit is held on the body by three bolts and a pressure nut. IIRC, it's the outer topmost corner of each unit. With gentle but firm pressure, you can get the unit out after you have undone the bolts. I've found this way the best and fastest to change a headlight bulb. HTH.