My Samsung Galaxy Si9000 Power Button cable is Disattached

Hey There, i had this phone for over a few years over 2 years or so... Then My Phone power button is broken but i didnt really had that much problem to turn it on when it was both turned on or turned off . But one day my phone was turned off and when i try to turn it on it didnt respone at all. so i try to disassemble it ( Hoping that i would find the problem and fix it with ease ) I found the problem that wouldnt let my phone to turn it on it was the power button cable ( That orange coloured cable thingy ) was disattached i try to reattached it but nope it didnt work ( It was not totaly broken alright i still can charge it when i insert the charging usb to it ) so yeah this is the the problem i am dealing with so if you guys had any ideas on how to turn it back on just let me know ant tips or method are apreaciated.
-Thank You