Looking for a dc 2pin connector with latch
Aluminium sheet, or aluminium pcb. Not exactly sure how you want to mount it. But maybe these through hole molex connectors 

Part Number: 26-01-3127

Mini-Fit Jr. Header, Dual Row, Right-Angle, with Snap-in Plastic Peg PCB Lock, 2 Circuits, PA Polyamide Nylon 6/6 94V-0, 0.38µm Gold (Au) Plating