The guide in the Maintenance Section was written by me and refers to upgrading the basic Triple Info Display to the Multiple Info Display along with adding various items such as coolant/washer/oil level senders.
Because of the extra features of the 2013, this is effectively a down grade, although much of the wiring you need is already going to the display. You'll need an age appropriate* MID with plug and 4" tail.
Re the wiper stalk, you need to see if the extra wiring is present at the column. Remove the column cowls and look for a small four pin plug (3 wires, brown/red/white or whatever the guide says). Pre '01 it will be a larger plug with more wires as you get a variable wipe control... Later cars have a rain sensor, so the only wires are for the BC.
If you have the spare plug taped up, the you simply need the matching stalk. No plug, then you'll need the stalk, both plugs and a 4" tail (you'll need to connect this appropriately to the MID plug.
Investigate what is currently fitted, establish what you require and go from there. Once you have the parts, it's simply a question of matching and connecting the wires as per the MID plug (NOT the current display). Use solder and heat shrink and do one wire at a time. You will have extra wires left over, so this method should ensure that nothing is missed.
*Don't trust ebay sellers on this point. There is plenty of info regarding the various screens on here in the FAQs/Maintenance Guides.