So, the hole in the bottom is not to be used? (Please excuse the pun)
They are obviously utterly pointless if you have binding posts as you are effectively just stacking binding posts! I’d personally recommend good soldered plugs every time.
Thankyou. Despite being obvious to you folks, having never used or seen these plugs I was unsure. Also I had assumed the hole underneath was also an option for cable entry
That helps explain your confusion, the ones I've used in the past didn't have the hole in the top. So my instructions didn't refer to it.
Hope you are sorted now