I too have a torqeedo motor... and was really worried about how to secure the thing at a dock when I went a wandering ashore! I finally found something by Dragon Fabrication - and LOVE IT! This comes in 2 parts - one to secure the plastic engine mount tabs with a more robust SS block and padlock. And one to secure the battery and tiller to the actual engine. Super Cool! Just $125 and great insurance (note, I am in no way benefiting from advertising this - just sharing a product that I love and appreciate). They are based in Boston, MA area.