Jack,
Unlike the Mon A outs which are balanced (2 signals conductors and a shield), the Aux in's and out's are unbalanced (1 conductor and a shield).
On a balanced 1/4"TRS, Tip is high, ring is low and sleeve is ground. In an unbalanced world TS, tip is high and sleeve is ground (ring is not used). The Aux's use tip as left high, ring as right high and sleeve as left and right shield.
A little thing to remember is "ring, right, red, return" On most mixers the ring is the return on an insert jack (DA7 also), red is always right, and ring is right on an unbalanced TRS like the DA7 aux's.
The TRS to TS/TS cable just breaks that out to two norman TS connectors. Hope this makes it clearer.
Michael