Charge Plug end bar levers

I have a Charge Plug with a Slice bar ( Bullhorn )
Looking to add some TT levers to the bar ends.
So I have two levers on the flat and another two on the ends.
Overkill maybe, but I would be grateful if anyone ca explain how I can do it.
Do the Plug's Promax 239A enable/allow a cable to continue to the end bars ?




Many thanks in advance...