what wires to what wires?
Go to pinouts.ru. You'll have to know a little about power supplies or take it to someone who does.
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to make phone - computer data cable
see here the entry maps of the plugs and wire each to its same one in the usb
to make phone charge cable (do only if the phone needs about 4.9 - 5.2 V)
find which wires in the phone charger are + -. link them to + - in the usb cable. dont link any data wires
to use the power block (the charger itself) to charge other usb stuff (do only if it outputs between 4.9 - 5 V !)
find usb socket and link + - to + - and leave data wires alone