Does the unit have an integrl diverter between handshower and rainshower? Which thermobalance do you recommend and which tub spout with diverter?
You should read the Installation Sheet as it provides detailed instructions. But in the meantime, You need to purchase a Hansgrohe 27458 wall elbow supply to supply water to the handshower. Then to use the showerhead, push the handshower up into the handshower holder on the bottom of the showerpipe. Any Hansgrohe thermostatic/volume control valve will work, but check out the Hansgrohe 32317 Single Handle ThermoBalance II Thermostatic Valve trim (valve required and can be added during checkout) which works great with the style of the handshower.