Yamaha YSP10 Service Information page 55

Connect the cable to the CE transformer's terminal block (left).
Connect the cables which connects to the air conditioning unit to the CE
transformer's terminal block (right).
(Below the left-side breaker) Connect the
power cable from the mains to the terminal
block's lower row.
SI1906002E-001=YSP10 installation and adjustment procedures
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For Service Engineers
Service Information
Lead cables from mains toward
inside CE transformer through
those holes.
(Below the right-side breaker) Connect
the air conditioning unit's power
cable to the terminal block's lower row.