I have made literally 1,000's of rj45 connections over the last 20 years. At this point I have about a 99% success rate.
Strip back the outer insulation about 1 inch, bend back the pairs gently, and cut away any rip cord or dividers. Next orient the cable so that orange is to the left and brown...
My Charger has laminated side windows, and they are tough.
Some a-hole tried to break into it last winter and hit the passenger door window 13 times with something,(center punch?). Outer laminate was cracked all over,with 13 pock marks, but intact. Inner laminate was untouched.
How often do you need to add coolant?
My car loses about a cup of fluid per year. Just going under the "fill" line when we get our first sub freezing temps. I assume that much is not enough to worry about. But more frequently, I might worry.
I had my 2004 Mazda 3 2.3 HB for 15 years. It was a great car. Just basic maintenance items. Mine was made in Japan.
I wouldn't hesitate to recommend them.