Help with simple 12V, Ground, & Remote Wire Connections

[joshua tran]

I have no idea how I am supposed to put my wires in here (third pic) with that metal thing that seems to be in the way. Is there a certain connector or adapter I need? If so please help and tell me what I need to get? This is the only help I need. Thank you.

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[Firewalker]

Those screw out using allen head tools. You loosen them up and then stick the wires in and them tighten them down very simple.