Automatically control switches in verilog

I have a little project in which I want to be able to have my FPGA 
automatically simulate "button presses" onto a device that is completely 
seperate from the FPGA.

What I'm struggling with is figuring out how to set up a verilog module 
that would essentially "close" the connection between the switch, given 
that the switch is the kind of switch with contacts on the circuit board 
and uses a capacitive membrane to close the connection with a button 
press.

My idea was that I would solder wires from each end of the switch and 
into the FPGA, then have the positive end as the input, with the 
negative (ground) end as the output, but am not sure how I can set up 
the module to recieve a signal from another module implemented in the 
FPGA to close that connection.

Any help would be appreciated.