Offset to the left away from the exhaust. Metallic colours on the ends?
Geo , please have a look at the pics there. I know that the kite shouldn't be an example rather but the Venturi tube seems to be moved to the starboard.
But the one has it moved towards the port side ...
the pic source: the net.
IMHO it doesn't matter to which side the offset is but the tube has to be off the stream of the exhaust fumes from the pipes.