The mystery of Med Mooring !
This is when there is no pontoon and all you have to secure against is the stone quayside. When first attempting this it can be quite challenging but have a read of the PDF file below and it will give you a bit more insight into what you should be doing.
The port shown in the picture is Hydra, Greece and an example of the type of quayside you may come across.
Feel free to get in touch if you would like any further information.