Yes, you just plug the freezer power supply into the Johnson control. The control overrides the freezers controls to establish a certain temperature. You do need to fasten the temperature probe to the outside of the fermentor and insulate it from the ambient temp inside the freezer. You want the control to monitor the wort temp not the ambient temp of the freezer.
Bottle conditioning beer takes warm temperatures. 70° to 75°F is good. Too cool and the yeast can't eat up the priming sugar to produce CO2.
The dry yeast with the Block Party Amber Ale was most likely US-05. Let it finish and clear in the fermentor for 15 to 21 days. Take a hydrometer sample and taste to see what you have.
Post back with the final gravity and what the sample of your amber ale tastes like. Chill the sample after reading the SG before tasting.