Here are two videos which may be of some help.
This one (which is actually to show how to replace the battery) is good because it shows how to open the tablet and also how to release the charge port flex cable from the systemboard. It doesn't show the removal of the charge port however.
This one, of lesser quality, actually shows the removal and replacement of the charging port.
If you watch both first, no doubt you will have a good idea of what you need to do.