Yes you can, when you’re also using a one-speed coast to park motor.
If you need to, you can use a toggle switch on the low speed (only!) on a two-speed coast to park motor.
Wire the park circuit “hot” through the ignition switch directly.
Use a single-pole, single-throw switch to energize the low speed brush.
REMEMBER: Do not use toggle or rocker switch with the high speed on a two-speed motor!