Accessories to Medical Device

We are class II manufacturers, and our device contains stimulator, its charger and charging cable. Can we call the charger and the cable as accessories or it is part of the stimulator? We don't intend to sell the charger and the cable separately except for replacement as spare parts. On the same context, we also have electrodes which is connected to the stimulator with a cable. The main intended use of the device cannot be achieved without the electrodes and cable. In this scenario can we call the elecetrodes and cable as an accessory to our device? We intend to sell the electrodes and cable each separately. I know if we are planning to sell the device separately, each need to undergo its own conformity assessment but the confusion is whether to declare it as accessory or not?  Thanks for the response.