How to install Humminbird Helix7 fish finder on Old Town Sportsman PDL kayak without drilling

How to install a Humminbird Helix 7 Mega SI sonar unit on a kayak with or without drilling holes into the kayak. We installed this on an Old Town Sportsman PDL 120 fishing kayak. If you want a sonar system but with no holes in your kayak, you can still do it. Humminbird Helix mount from YakAttack ...