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Dan -

On the Boston Whaler website there are over 50 diagrams available for download and viewing for your 2006 320 Outrage Cuddy.

I suggest you review these.

Enter YEAR, FAMILY, MODEL and select ALL TYPES. Click more several times.
https://www.bostonwhaler.com/boat-own...resources/

Given the complexity of your model, I would call Boston Whaler Customer Service and ask your detailed question to them.

You can call them at 1-877-294-5645 or email them using this online form.

https://www.bostonwhaler.com/contact-us/ontact-us/

Both have worked well for me.

As for sealant, a good polysulfide sealant is recommended over any silicone based or adhesive 3M 4200/5200.