I found some text related to that image with the flammenwerfer attachment.
" a highly unusual modification was carried by this Ju 88A-4 (9K+FB) werk-nr 1050 of II/KG 51 in rumania during 1941, the bomber was field modified with two flame thrower tubes mounted under the rudder. Altough successfully tested, the oil fed flame thrower never reached operational status on the ju88."
Learnt something new today...