Connectivity TR-8 to Arturia Beatstep Pro

as per Arturia instructions for TR-707 [ can’t find specific to TR-8 , they do seem very
similare ] - beatstep pro as slave/ tr-8 as master.
beatstep pro set to 24ppqn
sync socket out of tr-8 into beatstep pro clock input using the DIN black to jack adapter.
[ this adapter comes with the beatstep pro … there are no midi 5 pin input /output
on the beatstep pro ]
results: it does not work … if i start the tr-8 the beatstep pro should start …
no go !!
channel 10 it is on both units
have been stuck for awhile now ???
any suggestions will be appreciated
dusty bowl