I have created two mounts for the Anet A6 to use the BLtouch Z sensor for auto level. The 3D touch will probably work too but have not tried it. The first mount attaches to the 40mm fan and hangs off the front of the carriage. The other one screws into the heat sink on the right side and hangs off the right side probably the better of the two.
There is also a PDF I wrote that should step you through installing the BLtouch on the A6 and setting up auto level. It also goes over the install of the mounts.