alternator

I recently bought a 95 Gt and for some reason the alternator didn’t charge. After looking online I see that some people either replaced the gauge cluster (I did but no change) or take the green wire and tie it into a 12v source (I tied it into the low coolant reservoir wire and it’s charging)...

So today my car got stuck at work simply because it would not start. We tried jumpstarting it it cracks for a second then gives out. When starting without the cables it clicks then shuts off. If you have any advice please come my way!! Thanks in advance.