Hi! Big radiator is located at the fuselage.
http://aerophile.over-blog.com/article-un-projet-celui-du-breguet-820-48349675.html
http://www.minimakety.cz/journal/2009/40_let_dvacetinek/foto2/index.php?img=71&nick=1#img1
http://www.google.co.jp/url?sa=t&rct=j&q=&esrc=s&source=web&cd=8&ved=0ahUKEwi_mNva3d7XAhVGfrwKHQ-NAZ4QFgg-MAc&url=http%3A%2F%2Famisbreguet.free.fr%2FDocuments%2FBREGUET%2520820.doc&usg=AOvVaw02lhIjzithJM5SJC6iewxj
"The BREGUET 820 is one of the many French projects that did not even have the time to see the day, due to the Franco-German Armistice of June 1940."
"We know very little about this device." Given C 1 by the builder, it would seem rather that this aircraft was a hunting-place, given the importance of the glazed parts (?). »
"Very improved Version of Br-690/693, it has a certain resemblance to the English De Havilland Mosquito apparatus."
The 820 was to receive two Hispano Suiza 12 Y 51 engines. Its characteristics and performance are unknown. »
Model nose is little short? Based on initial version?