In looking through some of my spare parts today, I found a jack that still had the original decal on the side of it. Here you can see where it was placed and what it said. The decal is upside down in the first picture.
Mustang vendors sell a similar decal as seen above that one can stick to the side of their jack. In this picture you can just see the jack sticking out from beneath my spare tire. You can also just barely see this decal that is stuck to the side.
I stuck mine on the jack handle to make it easier to see ... stickers always look good at car shows ...