To connect the BMW f750gs rechargeable mobile phone stand, you first need to determine the location of the power cord and the interface of the mobile phone stand. Plug the power cord into the port and connect it to the power supply, then plug the phone stand into the other end of the power cord, and then connect the stand to the phone. When the power is connected, the stand will start charging. It is important to note that if any problems occur, disconnect the power supply immediately and check the connection. Also, make sure that both the power cord and the phone holder meet specifications and standards.