Left end is usual if you're right handed
Or if the bench runs wall to wall, about 1/3 along from the left end seems to work OK.
Being a lefty, my vise is mounted at the right hand end of my bench;
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/ubbthreads.php/ubb/download/Number/14068/filename/IMG_0940.JPG)
The job in hand there is silver soldering T-handles on to set screws, for a wee 'build project' I've got on the go.