I can confirm blue colour of cable tip.
a few less puns and a little more details would be cool. How do you unplug both the battery cable and the rear-touchpad wire from the mother board please?
Beware that some models of PSP 2000 (mine is a limited edition Crisis Core FF7 silver version, so I suppose it is related to it being a japanese PSP) have 2 minute TORX screws (T1? T2?) instead of the 2x 4mm Phillips pointed in orange around the USB port.