Yes indeed, for regular Hive witness votes, your HP counts, but for Hive Engine witness votes, it's your staked Workerbee that counts.
No worries that you don't have any, your support and trust is still deeply appreciated!
And on the Workerbee part, if you stake them, you receive BEE, and that is also a very useful and interesting token!
!STRIDE
!LOLZ
!WEIRD
!DOOK
!MMB
!INEEDSLEEP