Does anyone here know the RS-232 cable layout for a BenQ PE8720 projector? It uses a 8-pin mini-DIN as its connector on the projector side and needs to be a DB9 connector on the other end.

I have found some info for BenQ MP722, MP723, MP771 & SP870 (see below). But I would like someone to confirm that it is the same for the PE8720.

Mini-DIN <-> DB9
1 <-> 3
2 <-> 7
3 <-> 4
4 <-> 5
5 <-> 8
6 <-> 1
7 <-> 2
8 <-> 9