These male terminals crimp to the wires which relieves the need to solder. A variety of sizes are available and the slip ons are fully insulated in either vinyl or nylon.
Devco Insulated Connector, 12 to 10 AWG Wire, Connection Type: Male Slip-On, Nylon/Vinyl Insulation, 1/4 in Tab, 900 deg F, Pack Package, Package Quantity: 50