Connector Blocks. There are 3 size options: up to 2 wires, 4 wires or 6 wires.
Each set comes with:
1 x Male Connector block
1 x Female Connector block
Relevant Number x 6.3 mm Male and Female connector crimp tabs (A Professional Crimping Tool and Wire Stripper is available to purchase by clicking here.)
Generator Guru says:
These connectors are used on Generators, ATV, Motorcycles and other small engine equipment. They connect a series of wires together, making it easy to remove at the press of a lever. On the generator there are various sizes of these connector blocks.
Also good for replacing blocks that cannot be matched. If the existing connector block has 6.3mm tabs, just press the tab on the top of the brass tabs and pull the wire from the back. The wire will come out easily and fit. To fit to the new block just insert.