Arduino Nano analog pins + shift register

[merinsTDL]

Tested some board (DN22D08) which uses Arduino Nano + 2 shift registers (74HC595 to drive relays and 7 segment display.
http://johnny-five.io/examples/shift-register/
The board pin mapping uses Analog pins A2-A5 to drive the shift registers.

const register = new ShiftRegister({
    pins: {
      data: "A5",
      clock: "A3",
      latch: "A4",
    //   reset: "A2"
    }
  }); 

Type error as soon as I attempt to call functions on the register object (i.e. register.reset(), register.send(), register.display()).

TypeError: Cannot set properties of undefined (setting 'value') (firmata-io/lib/firmata.js:983:26)

It works with digital pin assignment but does not seem to support analog pins.

[merinsTDL]

Found out the issue. The Shift register can accept pins mapped as strings i.e. "A1" but instead they work and should be only using D14-D19 as integers for the Analog pins of Nano board.