I am ready to hook up a few panels. The connectors that are on these panels are labeled PV-JM608. Are these standard connectors? I googled them and got little info other then it appeared they are not the same as an MC-4? Someone was selling an adapter. When you go on amazon and look for premade jumper cables they don't tell you what the connector is, Just solar connectors. Trying to make sure I don't order something that doesn't fit.