I want to make my audio jack cassette tape to a Bluetooth. so One cord (the Bluetooth headphones) both left and right earphones I cut has a black and red wire and the ones I want to connect it to (cassette audio jack) has 2 cords I cut. showing copper and a blue wire on one cord and on the other cord a red wire. How do I correctly connect the red and black wire from the Bluetooth headset to the red, copper, and blue wire from the cassette audio jack?