1. 從後窗噴水管接一 “T”管
2. 連接到對準倒車攝像頭的噴嘴。後窗噴水時也一並衝洗攝像頭。
It should be very useful in winter, at least for me.
Windshield washer nozzle from EBAY:
https://www.ebay.com/itm/Brand-New-Windshield-Washer-Nozzle-Kit-A002/292431996382?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649