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method 1 not too ghetto**
find womewhere on the pcb where the 5 v circuit is 2 mm broad,scrub the varnish there , pierce the circuit there with a tiny drill (make sure the is no printing on the other side before you do that), solder the 5 v wire there.
method 2 much more ghetto
well what you will want to try is remove the coating on something like 5 milimeters or more of the 5v wire
use a sharp precision flat screwdrive or anything in that taste and scrub the insulation varnish on the 5 v circuit on the pcb anyhere where you can find the broadest area or circuit, if you havn’t such a place find somewhere you have 1 cm of straight printing. try to be carefull here you will want to avoid scrubing other circuits close to this one
prepare the naked part of the wire by heating it on your soldering iron and coating it with soldering stain, dont put too much you just need the stain to coat the wire, you dont want a big drop of stain to stick there.
prepare the scrubbed pcb area by heating it and coating it with soldering stain,it is an important step but don’t overdo-it or the printed copper si going to come off the board here as well, you don’t want that to happen a second time.
now solder the prepared wire to the prepared scrubbed area in a way that the wire is bound to the copper printed circuit on as long as possible ideally 5mm or so.
don’t pull anything from now and be very gentle when you manipulate the board.
get some glue (universal purpose glue/ vynil glue for wood things like that) put a big large drop of that glue all around the ghetto soldering, it is going to insulate the bond again, and drastically improve the mechanical resilience of the joint.
method 3 ultra ghetto
find some leg of a component soldered to the +5 v circuit, big enough for you to feel comfortable soldering a wire onto it, you will want to avoid the MCU if it has tiny legs, and every other micro component, try to find a good old capacitor/resistor it is you best bet. if you have a regular size mcu with big pins you can give it a shot as a measure of last resort.
prepare the wire as describe in method 2, you can now solder that to the leg of the component, or if more convenient, on the other side right in the joint where the component is bound to the pcb.
here again dont pull anything before having drenched it in glue or it is very likely it is going to come off.
apart from method 1 which is very much likely to cause you no trouble if you have the correct tools, the 2nd and especially the 3rd can further damage you pcb, train the method on a pcb you dont care about once or twice before doing it on the real one.
I did a full 8 button + stick mod hack using exclusively method 2 and 3 on a ripped logitech precision gamepad pcb and it works flawlessly.
once you have finished fon’t bother cleaning your pcb, check that there are no shorts, bind what looks weak with glue, insulate naked copper with glue, your pcb will look like shit but it doen’t need to be beautifull or clean to work well.
