Can I turn my Spa Jets in my inground pool into return Jets

I am a new pool owner ( under 2 months ).   Learning more and more everyday.  Here is my dilemma.

I have a 10K gallon inground fiberglass pool that the my only return jet is blocked and sealed off ( with some type of fiberglass patch similar to a bycycle tire patch ).   Are there interchangable heads to turn my spa jets ( QTY 2)  into a normal return jet?    For the last month the pool has been working ( I’m assuming using the spa jets as the return ) but gradually the motor went bad.  When they came to change the motor ( 3/4 HP Hayward Super Pump for my existing 3/4 HP US Motors Pump ) the head pressure built so bad it broke the PVC Seals apart.

Part 2 of the question is how are the spa jets connected to the pool pump, as in plumbing diagram?

Thanks

Skwirl23