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Hi. new to the forum. Found 30 200w panels at the scrap yard. (were 75 or so, but most smashed) All the panels have had the junction box ripped off the back, and manufacturer info scratched out. This leaves 4 (in some cases, 3) metal tabs hanging out the back. Please forgive my ignorance, but how do I determine what tab does what? I have hooked up a solar system before, but there were plugs and such - no brains needed. Thanks,
-Matt
-Matt