Might you be referring to spade terminal (crimp) connectors?
They are an easy way of attaching a power cord to the solenoid, though you could always skip them and directly solder the wires to the terminals.
If you choose to use them, just make sure that the wires are crimped properly, and you should be fine.
They are an easy way of attaching a power cord to the solenoid, though you could always skip them and directly solder the wires to the terminals.
If you choose to use them, just make sure that the wires are crimped properly, and you should be fine.