How to output H3D displacement with PEAKOUT for a frequency response subcase

Found the answer I think:

I/O section:

DISPLACEMENT(H3D,PEAKOUT) = "SID" / ALL  

SUBCASE section:

PEAKOUT = "PEAKOUT SID" ---> reference within (every) subcase otherwise PEAKOUT output doesn't happen

Begin Bulk section:

PEAKOUT card details