These cost cutting measures are really pathetic! Probably costs a few cents for cable covers and yet they don’t include them: Lowrance Hook series, Garmin striker series, Simrad cruise series..
I couldn’t find the right size end caps for the exposed cables on my Simrad Cruise 7 when not in use, so I ended up buying some waterproof outdoor extension cord covers (same ones people use for extension cord connections to Christmas lights)
Found these on Amazon and work okay so far! I stick the transducer cable on one end and the power cable on the other.
Flemoon [3 Pack] Outdoor Extension Cord Safety Cover, IP44 Waterproof Connection Protector, Weatherproof Electrical Box for Outdoor Plug, Outlet, Holiday Light, Halloween and Christmas Decorations, Green
https://a.co/d/89grIrJ