I was going to start a new thread but figured it would be more appropriate to add to this one.
All Yamaha's have a blank connector to keep dirt out of the additional accessory plug. Now if you have an older model, it may make sense to buy the splitter part but us X4 owners have plenty of plugs already (there are at least 6):
You can take that blank plug and buy the pins necessary to convert it to a harness. The male connector (plastic part) uses female pins and the female connector uses male pins (I know pretty confusing). The blanks are FEmale, so we need male pins.
You can get them here, which also has option for 2 different wire gauge sizes:
Male
https://www.corsa-technic.com/item.php?item_id=227 (these are what you need for the blanks already provided)
You could also just Google Sumitomo p/n 1500-0105 (male).
Don't forget to order seals as well:
https://www.corsa-technic.com/item.php?item_id=351
For under 10 bucks you could get the pin connectors for all your accessory plugs
UPDATE: Received my parts from Corsa. I had ordered the wrong pins (female) and they exchanged them for the male pins as well as combined my shipping
On the right you can see the blank plug which requires male pins:
I ordered two wire gauge sizes:
Simple to crimp on, make sure you bend over the tabs closest to the end as well or the pin won't engage the locking tab:
Ready to go, I only needed the positive lead:
If you're doing reverse lights you'll need the female sockets:
https://www.corsa-technic.com/item.php?item_id=226&category_id=111
