Shimano 105 ST-R7020 LEFT/FRONT Hydro Shifter (Hydraulic) - FOR PARTS or REPAIR

This listing is for the left shifter only. It has a leak near the area when you lift/fold up the hood as seen in the pics. I'm not sure where exactly but it's in that area. You can see the fluid residue. The shifting works on it but it leaks so it needs to be repair or for parts only or you can use it on a trainer without brakes, etc.