QRP Labs QCX-mini CW Mode D'emploi page 78

If it's Tantalum: Any>10uF, 16V.
Identify – and + wires (polarity is critical).
Positive is long wire, and + label on body
Cut negative wire to 5mm; tin the wire and
the left pin of the voltage regulator. This will
make them easier to solder in the next step.
Cut the positive wire right at the diode wire,
do not leave protruding wire which could
touch the enclosure wall.
Straighten the wires using needle-nose
pliers or something
The capacitor should be face (label) side
down. Pass the positive wire through next to
the diode body; solder (quickly) the negative
wire to the left pin of the voltage regulator.
Solder the positive wire to the diode wire, Be
quick... and check carefully for any short
circuits. You don't want short circuits.
QCX-mini assembly Rev 1.05_Fr
78