The only justification for a special adapter, is to enable TTL capability, if it is available.
The Metz 60CT1 does not offer any TTL capability. The 60CT2 (no longer made) and the 60CT4 do.
Accordingly, there is no reason to look for a special adapter for the 60CT1.
That being said, if you do get an adapter that provides TTL capability, it may still provide basic functioning with the 60CT1, and open the door for TTL capability, if you later obtain the appropriate flash head.
My 520 adapter works for TTL on my 60CT2 with my Olympus OM2n, and reliably triggers my CT1 as well, with any of my Olympus bodies.
And they are both great flashes!
Matt