Electrical connectors, and designing male or female parts to integrate with designs

I'm looking to integrate power into some of my designs. These designs are for automotive purposes but inside the cabin so no need to be completely weather proof. What Id like to do is have the male or female part of a connector designed into the print, so that I can buy the off the shelf male / female part and connect them together. Does anyone know if there are any such connectors already available for purchase and with the designs available to be integrated into a drawings? I'm looking at the moment for a simple +ve and -Ve terminal, Spade connectors are probably fine, although the smaller spade types would be preferable. If they dont exist ill probably just buy a male / female set and copy them but was hoping to cut a corner.Thanks

ask autowiz - he's the car guy :-)