Jump pins A and B, top row, far right.
A Socket Connector is where you are going to connect a socket
The DB25 connector on the rear of a PC is used (if it has pins) to connect a printer or (if it has sockets) to connect a modem.
No you do not.
You need some kind of connection to connect...
20- pin connector
A "Type A" connector.
usb connector
Use the connector.
It is a cable that can connect to other cables
7-pin connector
Yes, you can connect your camera to your iPad using the camera connector.
you can most likely do this but not with the usb lead you connect wirelessly