Dupont Cable 1 Meter Rainbow 1.27mm
These jumper cables are exactly what you need to make customized connections using the common 0.1" header. Use with perf-board, breadboards, breakouts, and more. You'll have a solid cable for quickly connecting any 2.54mm / 0.1" boards.
Sometimes these connectors are called "Berg" or "Dupont" or "Molex" - they're quite generic!