The link to Humminbird IDMK H5 In-Dash Mounting Kit For Helix 5 Series has been copied
This redesigned mounting kit is designed for use with all models in the Humminbird Helix 5 series. Simple in-dash installation of your Helix 5 unit includes cutting the mounting hole in your dash, installing the control head, and connecting the cables. Constructed for long-lasting durability in a marine environment. Mounting instructions are included. Note: This optional mounting kit is not optimized for metal in-dash installations.