Anyone installed or know good guide on installation of checker valve?   Karoq and other newer Skodas have plastic washer tubes, so it is not simple installation as with rubber tubes. Anyone knows good way to fit plastic checker valve like this one to these plastic tubes? https://www.amazon.com/SWF-Windshield-Washer-Check-Valve/dp/B001EMZW2O/ref=mp_s_a_1_fkmr3_2?ie=UTF8&qid=1546508118&sr=8-2-fkmr3&pi=AC_SX150_SY217_FMwebp_QL65&keywords=vw+washer+chec