Spare parts for pool cleaner Dolphin By-pass counterweight

Spare parts for pool cleaner Dolphin By-pass counterweight 3726283 Maytronics

• By-pass counterweight.
• Manufacturer: Dolphin.
• Code: 3726283.
• Valid for the following pool cleaners:
  Dolphin Avalon 20
  Dolphin Avalon 25
  Dolphin Blue Maxi 10
  Dolphin Blue Maxi 20
  Dolphin Blue Maxi 25
  Dolphin Cainan 1
  Dolphin Carrera 20
  Dolphin Carrera 25
  Dolphin E20
  Dolphin E25
  Dolphin Energy C
  Dolphin EX 10
  Dolphin Fon 20
  Dolphin Formula 20 _COPY0
  Dolphin Hammer
  Dolphin PoolStyle Plus
  Dolphin Racer Cross Over
  Dolphin S100
  Dolphin Seamaster CL
  Dolphin SX20
  Dolphin T15
  Dolphin T25
  Dolphin Zenit Zfun

where is it placed?

The unit has only one counterweight on one of the wheels. Looking at the rear of the unit, on the small wheel on the left.