2002 Buick Regal Shifting

I’m having trouble with the shifting. It does not seem to be slipping as much not wanting to find the gear. I changed the oil, filter and cleaned the pan. The oil was not burnt and pan only had normal material on the magnet. I’m thanking it’s a solenoid. I got the Auto Trans kick Down Solenoid (S8949) and the Auto Trans Control Solenoid (S9857). I asked if these were internal and was told no. They had no book on this car. All I can find is the speed control sensor. My question is, I’m I going in the right direction? Where are these solenoid’s, under a cover? Or is it something else?