I have the exact same boat, year, model and colors!
You open the dock light housing with the three screws on the front. There is a spring-loader retainer ring that is a little tricky to manipulate, holding the bulb. I used MR-16 50w LED bulbs found on Amazon.
Just a reminder, these are for DOCKING or pulling into a slip, trailer, etc ONLY. I’m always surprised how many boaters are running down the lake (and blinding me) with these on.