If you have a large size printer then it is more beneficial to mount your extruder on the X axis, preferably on the opposite side of your X motor to balance the weight putting on your Z motors and couplers, and to reduce the slack/play in the PTFE tube by shorten the length of the PTFE tube as much as posible. This will increase extrusion accuracy and better quality at high speed because of the weight distribution and short PTFE tube.
This bracket was intended for my FLsun i3 300x300 but should work on most extruders (Titan extruder shown in photos).
Check your clearances before you print.
Mirror the bracket if you want to mount on the right side.
Don't be cheap on the plastic now. You want it to be able to support the weight and to last.