Two blacks would indicate 230 V. The black will be the power, the white is the common on a 115 V pump.
MOTOR WIRING
1. Before working on any electrical connections be sure that the power is turned off.
2. All wiring must conform to local, state and/or national codes.
3. All wiring must conform to wiring diagram on the motor nameplate or on the back of the terminal cover.
4. Incoming line voltage must be within 10% of the nameplate voltage.
5. A solid copper bonding conductor no smaller than No. 8 AWG should be connected from the wire connector
on the motor to all metal parts of the spa or hot tub structure, and, to all electrical equipment, metal conduit,
and metal piping within five feet of the inside walls of a swimming pool, spa or hot tub when the motor is
installed within five feet of the inside walls of the spa or hot tub.
6. DO NOT ground to a gas supply line.
7. Ground motor prior to connecting to electrical power.
8. Improper grounding can cause serious injury and damage to the motor, voiding the warranty.
9. Connect only to a Ground-Type Receptacle protected by a Ground-Fault Circuit
Interrupter (GFCI).