Need help to locate 320BL excavator hammer solenoid location and how the hammer circuit work

Please I need you to help me on what to do to get the hammer working. I was called to fix the no hammer working. I found out it's an attachment but the owner said they have used the excavator for hammer before. Now when you step on the foot pedal for the hammer it will be raising the boom instead of hammer. Sn: 7JR01820