While this is good advice for anything electric, if your fixture is live to the touch you have done something wrong. Stop what you are doing (or trying to do) and hire a qualified electrician.
All of the copper traces are inside the QB288 board and all other wires and connections should be insulated. I will caution everyone that tugging wires though a hole in bare metal does tend to compromise thin wire insulation so you are at risk of a short and shocking yourself (or damaging equipment) if you are not gentle during installation. Once you plug your light in and test it then it is wise to use a voltmeter to see if your board is live but to me that is common sense when doing DIYs.
If you really do not know what you are doing then please hire a qualified electrician. With all parts on hand they should be able build this pretty quickly.