Typically, the trailing dancer places a hand on the back or
shoulder of the lead dancer. This helps keep the unit connected
together. The Japanese style is for the lead
dancer to place their arms comfortably at their side and slightly
behind them, extending their hands palms up and toward the trailing
dancer behind while the trailing dancer places their hands in the
leading dancer's palms. In either case, the idea is to physically
connect the dancers so that they stay together as a unit. At a
minimum, the Trailer should tap the Leader's shoulder to let the
Leader know that the Tandem unit is ready.
EN: 40