I have a 2002 WRX Sedan. Previous owner installed a Whiteline Sway bar and modified the rear suspension. I noticed a clunking sound in the left rear when driving and looked under the car. It seems that there is a connection piece missing between the end of the sway bar and a control arm attached to the rear end. I am not able to figure out what part I need to order to replace this. Can anyone help? Picture attached.