B&S on a DC silver eagle wiring & misc help

[Preston1977]

I’ve done some searching on here and I’m at a point to where I’m kinda stuck. I have a 2008 Dixie Chopper Silver Eagle SE that I just bought and restored. It had a 27hp Generac that grenaded on the guy I bought it from. I’ve replaced it with a 27hp commercial series Briggs & Stratton. At the back of the mower where the Generac used to plug in I’ve figured out the ignition wire that goes to an external starter relay, and a ground that I’ll have to use to shut the B&S off at the coil. On the B&S there are 3 wires in a plug, grey, red & black. I don’t know what to do with those 3 wires.
My other dilemma is this mower was a parts mower for someone and there was a lot of stuff torn off of it, it sat up outside for the last 8 years and no one remembers anything about it. I need help with the size bolt that goes in the shaft on the B&S

 

[Scrubcadet10]

What is the model number of the Briggs motor you put on it, it should be stamped onto the valve cover

 

[Preston1977]

49T8770004G1

 

[bertsmobile1]

B & R ?

 

[Scrubcadet10]

B & R ?

Briggs and Ratton?

 

[Preston1977]

Briggs and Ratton?

Lol Way too much on my mind yesterday with that storm coming at us ??‍

 

[Preston1977]

Briggs and Ratton?

Idk if it auto corrected or if I just did it but I fixed it to B&S. Way too much on my mind yesterday to even notice it said B&R ??‍

 

[bertsmobile1]

Hope you survived the storm.
The grey should go battery voltage with the ignition turned on
If so it goes the solenoid on the carburettor .

The black should be open circuit to ground with the ignition turned on & ground when the ignition is turned off and if that is the case it goes to the magneto .
The red will be battery voltage and goes to the rectifier

 

[Preston1977]

For the most part we did, it’s all minor stuff but a lot of minor stuff.

Thank you for the reply on the B&S lol. I’m going to hop back on it tomorrow afternoon once Dr CrossFit gets home and I get relieved of dad duty.

 

[Preston1977]

Another question I had, that little piece in the pic below was flopping around in what was left of the box the motor was shipped in. What is it for?