Using the above username, password, Pivot IP, and  Port, SSH into Level 2.  Once connected to the C2, find and utilize the appropriate application to pivot to the target IP and port.  Any ports listed in the Pivot Port range can be used to bind a local listener on the C2 server.  Once the pivot application is configured and running, use cURL or an equivalent application to access the flag.  Be sure to save the flag as it is the password for the next level.