Chris Scott,
yes, I meant "right hand". I was aware of the ambiguity when I sent it, but decided to leave it like that, because that is the wording used.
On the Dreamliner, being the "more electric plane", both main engines and the APU each have two starter/generators. The APU's SGs are designated "left" and "right".
A single dedicated starter would probably suffice, but since they are starter/generators, and two generators are installed for redundancy, one ends up with two starters as well.
Bernd