Modificated sustain pedal for clp 840

[sensimilan]

Hi, I'm working in a high school where we have a old Yamaha Clavinova clp 840.
Somehow the 3 pedals of the clp 840 has disappeared long time ago.
I've tried to contact the local yamaha distributor, but they don't have the missing parts at the moment.

What is most important for me is the sustain pedal.

So I have an idea to get a 6-pin din connector and connecting it to a standard sustain pedal and solve my problem.
The only thing I don't know is which legs on the din connector affecting the sustain pedal?

Can someone please advice?

 

[SeaGtGruff]

The ElektroTanya site has service manuals for a number of Clavinova models. The CLP-840 isn't listed, but I wonder if one of the other listed models might be similar enough to help?

http://elektrotanya.com/?q=showresult&what=yamaha clp&kategoria=&kat2=all