I dont have a pic but I know where it is. I placed it about to the left of the starboard strake/ There is about 3 inches between the strake and the edge of the mount.
Losing bottom is common and can often be corrected by adjusting the height of the ducer AND it's angle. It needs to be parallel to the sea floor when the boat is at speed. Usually the height is set so that the bottom of the ducer is a bit (1/4 or thereabouts) below the level of the hull. Use a straight edge held along the hull to set the depth.
The location of the ducer n general needs to be in a place that does not get turbulent water flow so take a look under the hull and stay away from things like thru hulls ( you probably don't have any in the bottom), strainers for washdown and or livewell and trim tabs.
I find that the angle that works best for me is (Lowrance ducer mount) one click up on the back edge from level. I hold bottom on my 208 through just about all speeds ( except in reverse
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My cable goes through the transom, yes the hole is a bit large but the clam-shell covers it. It looks better than running over the top and is not exposed to possible damage.