Attach the other end of the flexible steel hose onto the bottom of the bidet.
Make sure the threads are lined up flat and not at an angle to avoid leaks! Use your hands to tighten the connections until it's firm. You don't need to over-tighten it.
Make sure the bidet knob is in the OFF position
SLOWLY turn on the water valve (lefty loosey). Let the water run for 20-30 seconds and watch for any leakage at the connections.
Getting a leak on your first try is common, and it's an easy fix!
Turn the water off
Unscrew the connection and, if needed, add Teflon tape to the threads to seal them.
Reconnect the system and make sure all fittings are flat and properly aligned when you screw them together.