I got this power barrel plug. http://www.digikey.ca/product-detail/en/PP3-002A/CP3-1000-ND/992136
It doesn't have any hole for me to put a wire through. The wire just goes into the hole for approximately 0.5cm. How am I suppose to solder this? I also tried crimping it, but it flatten the tube and causes the centre pin to touch the bottom pin.
Also I found it really hard to solder even on the bottom pin as the solder doesn't really stick to it.
I wonder if anyone could give me some suggestion on how I can attach wires onto this barrel plug.