New 1000W 230V Aluminum Plate Heater Tempco

brand new tempco 1000w 230 vac plate heaters, immersion type, works great for sitting your wort on to keep it warm happy and fermenting! part# ( ? ) cbh08270 or maybe 73-105358 k0002. overall length of the plate excluding the height of the electrical terminals and the mounting stud is 14 3/4", width is 10", and they are a 1/2" thick. mounting stud looks like fine thread 1/4", it's an inch long, and the electrical connectors are 1 5/8" long. that end where the electrical connectors are looks like it might mate to some sort of housing. i don't know what. tempco has a wesite so maybe some digging will lend some answers. looks like one heck of a nice heating plate! on the bottom there are five 1-7/16" round depressions that have been milled into the plates, i assume that is for mounting them flat so they don't slide around.