Where to place block heater on 2013 Chevy captiva?

There are different types of block heaters. You can place a magnetic heater on the engine block, transmission pan, or on the oil pan. A hot pad heater can also be placed on the oil pan or transmission pan. An external engine oil reservoir heater is plumed into the oil supply and pumps the oil through the heater and keeps it at a set temperature. A freeze plug type heater is installed by removing one of the freeze plugs and replacing it with this heater. It then heats the coolant, thus keeping the engine warm. Then there is the lower radiator hose heater that also keeps the coolant warm. And there is also the dipstick tube type heater that you simply install by removing the engine oil dipstick and replacing it with this type heater. There are multiple variations of all these type heaters.