@Sal V I found this reply from you in another topic with a larger image of what appears to be the same layout as the smaller image above.
Your question here is where to put the bus wires. Answers would depend on your choices for the following questions:
- Which side of the layout will your transformer(s) will be located?
- Will you be operating: Conventionally, Lionel TMCC/Legacy, Lion Chief, and/or MTH DCS?
- If conventional operation is desired, do you want to control more than one locomotive at a time?
- Do you want to divide the layout into electrical power districts or blocks?
Detailed answers would be helpful.