96 Civic EX with B18B1 swapped engine ECU error?

Just bought a 96 Honda Civic with a swapped B18B1 engine. With no check engine light on, took it to a California smog shop to get it tested, it couldn t be read. Car turns on and drives good, has no check engine light on and can t be tested.

I m not sure what to check for as far as the harness is concerned, which I m assuming is where the problem is.
Any info, tips or links that could help me troubleshoot this problem would be appreciated. Thank you.

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