I strongly recommend a single connection from neutral (white or silver terminal) to ground (green terminal) with no connection to the line (brass or yellow) terminal. Either 50k ohms (two 100k resistors in parallel) or 100k ohms (one resistor) connected between neutral and ground is fine. If you use two resistors (one to line and one to neutral) you could have a safety issue if the resistor connected to neutral becomes disconnected or fails. In that case, the neutral terminal of the generator is elevated to 120 volts with respect to ground so it would be like plugging something into a receptacle that is wired backwards.
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015