You can wire nut and ignore the electrical connections since you will not have any need for those with the SW6D.
For future reference, mark the wires as to function in case you ever decide to go back to a SW6D-E.
The 120V wires, put those in a electrical work box and wire nut off inside the box so you do not have a random 120V wire dangling around to cause trouble.. Mark the box as to what its function was for future reference.
12V wires do not need to be in a work box unless you want to make things neater and if you do, put them in a separate box from the 120V wire.
