scp with jump
Send local file to remote via jump server.
scp -P {remote_server_ssh_port} -J {user1@jump_server:ssh_port} {local_file_path} {user2@remote_server:remote_server_file_path}
Receive remote file to local via jump server.
scp -P {remote_server_ssh_port} -J {user1@jump_server:ssh_port} {user2@remote_server:remote_server_file_path} {local_file_path}
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information