From what I understand, the Ju 88 A-6/U was made from the Ju 88 A-6 balloon cutter. The balloon cutter and gondola were removed and radar added. In this link;
Ju88 with FuG 200 Hohentwiel | World War Photos
is a picture of a Ju 88 with fug 200 and a gondola. Have the ground crew just not gotten...