2.54mm Short Block Jumper Block Connecting Block Pin Connector Pin Cap Closed Circuit Risk - Connectors - AliExpress
File:Jumperblock-shunts.jpg - Wikimedia Commons
Allen-Bradley 1492-SJS Terminal Block, Side Jumper, Insulating Sleeve, No Cover, White for use with Cat. No. 1492-N39, N49, H1, HM1, H4, H5, H6, H7 | State Electric