adding a service dependancy - service has spaces in its name

am trying to find the correct syntax for adding a "service dependency" for
a service we have created.

in this instance we have a service called "test engine" which relies no a
service "test backend" running.

I have found the registry key to edit (I think)
- for our "test engine" service in the registry I can see the key
"dependonservice" within the registry. The problem I have is that by the
looks of it the syntax expects the service to be 1 word - a space appears to
be how different services are listed.
Can anyone clarify if quotes or some other such method is valid for naming
the dependency when it has a space in the name ?

- I don't really want to go blindly testing stuff as despite the name, it is
a production server ...