I have a Matchless DC-30 clone which has an effect loop for each channel, so there is Effect Loop A and Effect Loop B.

The thing is it uses a stereo Y-cord, which is stereo in one side and has two mono jacks on the other side.

The question is, how do i connect a pedal so i can use it in both channels?
I'm thinking some kind of A/B box, but i can't seem to really understand.

I hope you understood. haha