This can be quite confusing for those that haven't been to the resort. One suggestion is to go to Redweek to get a clearer idea of what the different sections are. You'll see that on Redweek, the rentals for Marriott Maui Ocean Club are available for 3 different and distinct options: (1) "Maui Ocean Club" (is old hotel that is also referred to as "Molokai, Maui & Lanai Towers" as davidvel has indicated and only have kitchenettes and mini-fridges; (2) "Maui Ocean Club - Napili Villas" (is one of the new purpose-built towers that have the full kitchens - oven, dishwasher, full fridge/freezer - with in-room washer/dryers in one, two and three bedrooms but not studio; towards the Napili/North side of resort); and (3) "Maui Ocean Club - Lahaina Villas" (same layout as Napili Tower - just towards Lahaina/South side of the resort). You should also know that if you rent from a Napili or Lahaina owner, unless they have a fixed week, the owners of floating weeks won't be able to know which tower (Lahaina or Napili) they will be placed in - just that their view is guaranteed. But just make sure that when you rent - be very clear about which option (1, 2 or 3) you are being offered. The "old" Maui Ocean Club section (option 1) rents for lower than the "new" sections (options 2 or 3).
One consideration/potential complication for you might be the short length of your stay. Most rentals (at least on Redweek) are usually for an entire week so if you're only staying for 2 days, you may need to find somebody who has points and can actually work with you on the specific days you want to stay at the resort. (Maybe other TUG members might be more familiar with how one goes about renting for less than the full week.) Renting directly from Marriott might solve this problem and they'll clearly be able to let you know which section you'll be staying in. However, their rental rates are a lot more than renting from an owner. Also, if renting from an owner, don't hesitate to negotiate because the prices on Redweek for example are simply the "ask" prices and not the actual "buy" price that was actually transacted. Hope this helps and not add to the confusion.