Yea so did I 7 years ago but I would not waste my time with an obsolete Flight Controller no longer supported today. I actually have an old quad with an APM that also has a inoperative USB port. A telemetry radio works fine except for updating firmware but of course that’s not a problem as there is no firmware to update.
You will be pretty much on your own figuring it out as there is no one left around to help. You can see this pretty much anytime a question comes up about an APM.
Here is one from today Obsolete APM