You are correct....you will need to remove your canopy to access aileron Rx connection etc.
Ok....on the inside of the fuselage....THIN CA nylon nuts to screw into......or, this is a method I use....radio box tape for boats (similar to scotch tape but does not leave a residue), paste pieces over the screw heads when the canopy is in place...it will stop the screw from vibration loose. I have the Seagull Laser 200 with the same method of holding down the canopy....flown 7 times.....and no sign of the screws backing out.
It is a pain to cut radio box tape every time you place the canopy on....If I had the problem, I would CA nylon nuts inside the fuse...the screw holds in tight.
Cheers.