Draining 87 124 603 radiator
 

I need to prepare to replace block heater tonight and can't find a drain in my South African Behr radiator. I have looked at it several times and cannot find one. Would it be just as well to drain the block by way of the block heater element removal or ?

Never mind. I was looking for a large blue button on the bottom. Must be my 123. This is a little red fitting on the front left. Once I drain the radiator am I more or less faced with just pulling the heater element and dealing with what's in the block i guess and refill should be thru the plastic canister on top I assume.