Marine Speakers Waterproof 180W LED Lights Low-Profile 5.25" Pair

What diameter do I cut the hole for these speakers.

4.7"

There is no power to the exterior speakers. Where and how is the best please to run the power?

There is a designated wires for the LED Light and separate wires for the speakers

I purchased the PLMRS53WL Speakers with LED lights. What's the best way to hook the LED to the power?

There is a separate wires to power the LED lights, the lights are not powered via the speaker wires. Yoy may use a 14 AWG wire.

Wiring diagram for PLMRS53WL not clear. I believe the speakers connect to radio. Lights goes to power . Do they go on when you turn on radio or need a switch ???

you are right about the connection but about the LED power, it goes on as soon as the ignition switch is on. You may want to place a switch so you can turn it off

What voltage are the leds? Do they have built in resistors?

The built-in LEDs operate on standard DC 12V power. They do feature internal wiring designed to handle this 12V direct input from your boat or vehicle's power supply safely. You can connect the designated light wires directly to your 12V power source or a switch.