1993 4WD stdbed, 22RE.

I am replacing my exhaust system, downpipe back. And the new cat I got
is a bosal 099-448:

https://b2b.bosalnafta.com/products/partsimages/bos099448-1.jpg

I can't find any direction arrow on it at all. I've looked and looked.
And at this point, I'm not even sure which way the shield should go. I
have the heat shield down right now, seeing a heat shield above it on
the floorboard - thinking it might provide some slight impact
protection from rocks kicked up on the road - and I have the fixed pipe
flange on the engine side (adjustable flange on muffler side).

anybody with some experience with this cat?

thanks,
jim