On the original model b it was possible to wire power to the tp1 and tp2 (which ran through the fuse and was protected?) I am upgrading my 3d printer to run with a b+ but the b+ does not have the same tp pins. Is there a different way to wire power to the b+ that doesn't use the gpio header or micro usb?
Edit: i am using a 12v to 5v3a to get power to the pi if this helps.