The complete description for mission 962 can be found here for example, see April 20:
http://paul.rutgers.edu/~mcgrew/wwii...ml/Apr.45.html
Note:A link to each month during the war is here which also includes a couple of download options:
http://paul.rutgers.edu/~mcgrew/wwii...tml/index.html
Mission 962 for April 20 is broken down into 7 parts, with part 1 being the attack that included Nauen.
It states that the claim of (7-0-4) Luftwaffe aircraft (see part 4 in the link) relates to mission parts 2 and 3. Thus there were no claimed Luftwaffe losses for the attack on Nauen, which was in part 1.