The two diagrams you supplied are slight variations of the same circuit. It is called a push-pull oscillator. either circuit is fine, but if you already have the 3055s then go ahead and use the 2nd circuit and the values it supplies.
The bulbs of your crossing flasher are 'output 1' and 'output 2' of your second diagram.
Note that the pink wire is the common lead to the bulbs (terminal 1 on the 154 crossing flasher). This wire also connects to one side of each of the two 39k resistors and the power switch (a push button like a doorbell switch is what I use for the kids to have interaction with the layout).
