Octa newbie question

Hi everyone!
i got an Tr-8 and as i only have 4 inputs on octa i am using just one mono cable to connect it to octa.
Of course i would love my drums to stay central but they are either left or right.
How do i make them central, i cant do it in the mixer screen, do i do it through thru channel?
please help :sweat_smile:

Mono output from TR8 into OT input A.
Thru machine , select input A
Place trig and start the sequencer or hold track plus play.



This is the important bit. Only select ‘A’.