If i was you I would run to the nearest gas station where they sell the cheap lil 5 dollar laser Pointers....That old people love so much...don't ask...anyways gettin off topic already....
1st Step...Mount laser to something hard and sturdy and about 2' high or so...and have it a lil ways away from bike so it will not be desturbed/moved by accident
2nd Step...Take off Side fairing.....Aim laser at motor mount hole below fairing mount hole....Adjust and resecure laser pointer....
3rd Step reinstall side fairing....measure frame slider outer Diameter(OD).....go to walmart/sears/lowes or where ever and pick up a hole saw for drill to match or 1/8 larger so it doesnt rub...
4th step.....take a load off....open a beer or two
5th step...turn on laser pointer...it will show where the frame hole is where the slider will be installed....now put center of drill bit on laser point and voila.....
Repeat for other side and feel good that you may save your fairings one day
John