I think those are quite recent modifications made during restoration in order to house the (Mazda?) three-rotor Wankel engine.
A Mazda? Oh dear...
I seem to recall this picture came from the same site as that red 1000 SP Coupé "prototype" I puzzled a few weeks ago (not Akkermans!)
It was a Dutch DKW site and I'm amazed that such a site contains so much wrong information.
I emailed them (twice) seeking clarification and more information, but of course received no reply at all..
Enthusiastis? I really don't think so..