No. You have an offset dish so you don't have to worry about declination that's why the dish is offset. The only adjustment you have to make is the elevation. You set the inclination on the motor to your latitude from your pictures that's 34 degrees. Set your dish elevation to 50.47. Point the dish true south and follow my previous instructions.
You don't have to be a mathematician here your over thinking the problem. Keep it simple.
You don't have to be a mathematician here your over thinking the problem. Keep it simple.