請問S40的雨刷精要怎麼自行添加?

小弟不是很懂車子, 看了手冊要添加雨刷精,卻寫了兩個地方(不懂雨刷精跟 engines and diesel有甚麼關係)
有點不敢亂加, 想請問有人有自行添加的嗎? 能否指導一下...感謝

The windscreen and headlamp washers
share a common reservoir.
1. Filler cap on 4 cylinder engines and diesel.
2. Filler cap on 5 cylinder engines.
Add washer antifreeze during the winter so that the fluid does not freeze in the pump,reservoir and hoses.