JONARD TOOLS Solar Panel Crimping Tool Kit for MC3 and MC4 Connector Contacts with Included Spanners and Insulated Screwdrivers SPK-100 - The Home Depot
PV-A-KBT4/KST3 MC4 Female to MC3 Male Connector Adapter - Solaris
Solar adaptercable MC4/F to MC3/M L=15cm – Master Tech Solar