To connect the Crash 2 Pad (CY-13R);
Using the separate included V-Drums cable, connect the right-angle side to the BOW/EDGE output [only] on the CY-13R.
Connect its opposite (straight) end to the CRASH 2 input on the back panel of the TD-27. The BELL output on the CY-13R is not used for the TD-27KV setup.
The TD-27 supports one fully functioning ride pad at a time. In the case of the TD-27KV setup, the CY-18DR is the 3-zone ride pad. All other connected crash/ride pads will produce dual trigger (BOW/EDGE) results only.