Please ignore this unless you specifically want to keep the EF X-20 on camera.
Otherwise, get a Canon compatible TTL sync cord and detach the flash from the camera. With all honesty, the side light will look better and the lens will not cast a shadow.
Also, if you are Ok to lose TTL, look at a tiny radio triggers, such as FlashQ, or cheap, but versatile radio flash FlashQ Q20. I use this little thing when I need portability. It takes at most 2 attempts to get the shot right without TTL.