In principal; but not between the hay filter and twinflaps, rather on the input side of the hay filter. This will also take care of a leaking lid and rusted-through leaks in the hay filter!
So the line from the condense tank will have a T-branch, one with a back-flap toward the hay filter, and the other branch with a back-flap toward the shop-vac.
All this because or if the shop vac has “all feed through” cooling of the motor!
IF the motor has a separate cooling air stream, much of these preparations would be less mandatory, but still useful.
Still, in the winter, freezing condense on the flaps make trouble, if not lubricated with water resistant vaseline.