TOP GUIDELINES OF SOLAR PANEL WIRING HARNESS MANUFACTURER

The MC4 solar connector established in 2004 is really an enhanced Model of the MC3 connector, featuring a 4mm2 Get in touch with pin, an economical safety mechanism, in addition to a realistic set up that turned it into a normal during the solar business. it is a dumb dilemma but I’m not solar panel savvy. What do the rubber plugs at the end