Newbie accessory question

Yes.
Once you understand what the factory did, then the best way to add each of the new accessories can be figured out.
There will be more than one way and advantages and disadvantages to each. It's easy to describe changes as 'upgrades', but they aren't always.
That's why I didn't provide a specific answer before or now. Then you're just doing what I suggest, which would be based on very limited info about your accessories and how you intend to use them.