You should use the following command:
scp -i $EC2_PEM $FILE $USERNAME@$REMOTE_HOST_ADDRESS:~/$PATH_TO_REMOTE_LOCATION
In this the following is what to use for the variables:
$EC2_PEM
- The PEM for connecting to the server (what you would use to SSH)
$FILE
- The name of the file (private key/public key), providing the full path (either absolute or relative) to the SSL on your current host machine
$USERNAME
- The username used to SSH to the remote host
REMOTE_HOST_ADDRESS
- Either the IP address or domain name of the server you are attempting to SCP the file to
$PATH_TO_REMOTE_LOCATION
- The path that the file will live on disk
You will need to run this for each file individually.