Is it possible to create widgets (Textbox or Slider) without creating a new axis?

Is it possible to create widgets (Textbox or Slider) without creating a new axis?
Maybe with a translated (or transformed) standard axis?

My code at the moment is:

...
  fig, ax = plt.subplots()
  plot(x, y, 'bo', label='data points')

...
  # for every slider I create new axes at the moment and hide it
  ax_xc = fig.add_axes([0.675, 0.8, 0.08, 0.05], visible=False)
  sl_xc = Slider(ax_xc, label=r'$x_c=\ $', valmin=tempMin, valinit=tempMin, valmax=tempMax)
  sl_xc.valtext.set_visible(False)
...
  # adjust the main plot
  fig.subplots_adjust(left = 0.05, top = 0.85, right = 0.65, bottom = 0.25)

  plt.show()

Is it possible to replace ax_xc with a translated/transformed version of ax without changing ax?