Be …..VERY SURE…… that the circuit breaker feeding power to tub has a GFCI or similar device to prevent electrocution of people bare foot . A…. weather proof …..service disconnect switch near the pool is a excellent requirement. Turn off power while working on the pump or any other electrical part of the pool.
Water & electricity are a deadly combination. Plenty of shocks and deaths of that happening at boat docks with 120 vac getting into the water.
There is NO 2nd chance with water & electricity.
He’s right…you appear to want a quick/cheap hookup but your liability on this is staggering. I’m a licensed MN master electrician (40 years) and I’d advise you to hire a licensed electrical contractor (not just a licensed electrician). A licensed electrical contractor that pulls a permit and does this properly is your best move and if god forbid you have an issue, your covered. If someone gets hurt or killed, even slips or falls, guess what…you’re on the hook for this. Your insurance company is going to turn on you in a millisecond. My guess is the dealer you bought it from offered this service (or a referral) and you want to go about it easier/cheaper. Bad move…just my opinion.