[Julian_Boolean]

Cut the end off the SCX controller and join the two wires from the end to the black and white wires of the Parma, it doesn't matter which way round they go if you're not running brakes, the red wire on the parma is the brake wire.

If you want to run brakes it's a bit more complicated as you'll need a multimeter to make sure the right wire goes to the right place. Let me know if you want to wire for brakes and I'll explain it.

 

[Julian_Boolean]

The easy way to do that would be only connect the timing lead and power to the Chrono and don't join the Chrono base unit to the track, just use the timing section as part of your track.

 

[Julian_Boolean]

With SCX cars brakes don't make much difference, but with Ninco cars the effect is noticeable, the car will stop much quicker when you close the throttle, the Parma should be wired as follows, this is from memory, first of all with the Parma not connected to anything and the throttle closed the red wire and one of the other wires (black I think) should be short circuit, now test the pins on the back of the chrono where the controller connects, one of these will be short circuit to the left hand rail (as the car travels) the black wire of the Parma connects to this pin, the red wire connects to the left hand rail NOT the 3rd pin on the chrono, this isn't connected to anything, and the white wire goes to the remaining pin.

 

[Julian_Boolean]

I think you need a better soldering iron, one that's smaller is probably what you need, the cheap ones sold in DIY shops are pretty poor, I try and borrow a good one from work.