Hi Tim,
Disregard my last post regarding 1 resistor. It would work but your flasher would be clicking all of the time regardless of your turn signal switch position. Your lights would flash when they were supposed to but the flasher clicking would probably drive you nuts. Another senior moment blush .

Anyway, you can wire your two new resistors like this . The new wiring is depicted in red. I based this on my Signal Stat 700 turn signal switch which has an output wire for each corner. If your switch also has 1 output wire for each corner then you can connect one resistor to one left wire and one right wire. In this case each resistor should have approx. 1/2 the resistance of the turn signal filament in one of your old bulbs. Resistance is not critical but should be somewhat close to maintain the original flash rate.
Hope this helps!
Best regards,
Les