hifi engine

Akai GX-635D 2sk68

I recently bought an Akai GX-635D and the pervious owner had taken the machine apart and tried to replace the dead 2sk68 transistors but with no luck so he decided to sell it. I checked the transistors but I couldn't find gate Side of the legs and the symbol. I also have the service manual but couldn't find the direction SDG or GDS. Can anyone help me with this please

Thank you.