This stat is about the 39 assists out of the 42 field goal attempts. On espn it states:

The Bobcats recorded assists on 39 of their 42 field goals on Monday, 93 percent. Over the last 50 years, only two other NBA teams have made that many shots in one game, while having an assist on such a high percentage. The Bulls had assists on 46 of 49 field goals in a 124-105 win over the San Francisco Warriors on Nov. 15, 1969; and the Nuggets also had assists on 39 of 42 shots in a 116-102 win over the Knicks on Feb. 16, 1977.
http://sports.espn.go.com/espn/news/story?id=2796621