Connector name and wiring guide?

Sorry, forgot the picture last time!

Putting together an off-grid system and have a couple of questions (I have a ton of questions but the rest can wait for now lol).

What is the name of this connector, and where can I find a guide to wiring up 28 panels to a used 7200w Q-Cell w/2 MPPT (1 string per MPPT)?

TIA