yauyaursk ~ So sorry for not posting yesterday... I got distracted with other things. Thanks for posting the larger pics.
The white light indicates (I believe) that the light is coming to the front of your film. Orange/red light would indicate that it is hitting the back of the film.
As mentioned, images are inverted, so it seems to me that light is possibly hitting the front, top, right side of your negative. There's also a little light at the left corner on two of the above shots, but this could be the same leak hitting two frames at once. If so, it will show up on the negs, in between frames also. (I think?)
The shutter overlap is on the right side (holding the camera with the shutter cocked ready to shoot) so possibly there is a slight gap at the top of the curtain overlap. Please understand, I'm just guessing here and trying to suggest areas to look into.
To check this, you might try taking a few test frames indoors. With the lens cap on, wind the film to a new frame, then without releasing the shutter, remove the lens cap and shine a very bright light into the lens for several seconds, then put the lens cap back on. With the lens cap on, release the shutter.
On another frame, take the lens cap off and while holding the lens near a bright light, slowly wind and cock the shutter. Then replace the lens cap and release the shutter. Possibly the shutter is gapping as you wind the film.
Have the leaks occurred on several rolls? Or just one? I have a Zorki.4 that gets orange leaks (probably light hitting the back of the film) about 1 or 2 frames every other roll. I don't use it enough to find the leak, but it drives me crazy!
The best of luck to you. Keep us posted.
And P.S. ~ I like my Zorki.3 MUCH better than my Zorki.5. If my choices were to CLA a Zorki.3 or buy a Zorki.5, I'd get the CLA. IMHO.