The first step in attaching a leash is, of course, the connector between your board and the leash… called a leash rope. This is usually supplied with your leash. If not, you can get one in any surf shop, usually at the checkout.
The Leash Rope is already knotted and can be easily pulled as a loop through the leash holder of your board. Make sure that the Leash Rope does not overlap the tail of your board at the end.
This is where the rail saver should rest later to avoid damage to your board.
If the leash rope sits there, it can happen during wipe outs or other situations in which your board is far away from you that the rope rubs against your board and damages it.