For those who are unfamiliar with northern climes, that's a block heater installed in the H2O jacket. You're missing the electrical cord which attaches to the 2 prongs and terminates with a standard 3 prong electrical plug. All Canadian Fords of our vintage (90's) came with block heaters whereas they were optional in the US. My 3.0 which came from an '01 CDN Taurus did not have a block heater.
As a side note, I've worked on a SVT from MN which (surprise, surprise) did not have a block heater. They need 1 there more than we do here!