Connector block, directly attaches to trapezoid-shaped wedges on standard breadboards. Provides 5x 4mm connectors and 5x 2mm holes for cables with 0.6mm pins at the end that go into the breadboard.

Matches this style breadboard: https://de.banggood.com/Wholesale-Test-Develop-DIY-830-Point-Solderless-PCB-Breadboard-For-MB-102-MB102-p-51331.html?cur_warehouse=CN&rmmds=search

Uses this style 4mm connector: https://www.reichelt.de/buchse-4-mm-schraubverschluss-blank-bu-10-p5980.html (6mm hole, 15mm long thread)