Ummhhh... I do not have a specific book on He111. My sources are "Bombers of World War II" edited by David Donald of 1998Grzesio wrote
So how could it carry three SC 1000 or two SC 1800, as e.g. the He 111 H-11 Flugzeug Handbuch shows?
In this book is mentioned a bombs load of 2500Kg for H-5 and 3000Kg for H-21 with Jumo 213 engines.
Sturm78