Here's a before and after pic of a similar piece of wood which is carved into a "Sliding Deadman" and holes drilled.
Also some coated screws for the long stretchers to attached to the bench legs.
|Left "Sliding Deadman coated with Linseed Oil", right similar raw wood used for carving out the sliding deadman|
Initial stages of shaping a "Sliding deadman"
|Half way through shaping of a "sliding deadman"|
|Coated screws for the long stretchers and bench legs|