Sony Xperia Z1 (C9603) charging dock

Prints in 2 parts, the dock has a hole where you can fit an original magnet charger connector that you bought somewhere (On amazon for around 9 Euros).

Or you can print the connector part and solder a 0.75mm copper wire to a stripped USB cable (look at the last photo). It prints as a seperate part because the wire-holes tend to close up due to the plastic shrinking or sagging, so you'll have to drill the holes to get the wire through.