I was looking to attach a Molex connector to the end of a USB by cutting a male Molex connector with a cable, and soldering the black and red USB wires to the black and red of the Molex cable with the attached male connector.
I was wondering if this would reduce the power draw to my device, for instance: I wanted to attach a peltier device to a USB cable for power, and I know that the peltier device has a red and black wire as does the USB. However, I am trying to avoid soldering the wires of the Peltier and the USB together as I would like to be able to de-attach them. So I wanted to take a molex connector, something like this, cut it in half and solder the male side to peltier wire and the female side to the cut usb wires. But will I lose power?