As far as I remember there was a Cypress post to develop CapSenses which could be connected with cable to the button/slider. The problem with such a configuration was the capacity of the cable compared to the change in capacity when the button was "pressed". Although I do not read every post here, I have not seen yet any notice of this task beeing finished. Seems to have to be answered by Cypress.
That u tube post was VERY helpful. Thanks Very Much. Tim