Using tape or clamps to hold the wires together will allow for an easy soldering experience.
Line 2= as it is
Now the wires will be free.
Locate the end of the wires and gently pull the two plastic covers off.
"With the Phillips head #2 screwdriver, remove the two 10mm screws that secure the white bracket."
(The white safety bracket holds the cord down) After removing it, the cord will be free.
"Gently lift the power cord from its slot and place it to the side."
"Once the screws are removed, pull the plastic base up using slight tension as you pull."
I will leave the second line as it is
It would be better to switch these points around because if someone begins unscrewing the screws and the device is plugged in, who knows what might happen. It's better to put the warning first instead of second.
I would correct the first line to read, "With a Phillips head #2 screwdriver, begin unscrewing the four 10mm screws located on the bottom of the power base."