Good place would be under the mileage.
On 3 legged route, there are 3 cells:
- Origin to tech stop distance
- Tech stop to destination distance
- blank (display RI there)
On a regular 2 leg route, there is only 1 merged cell. Divide it in 2 and show distance in 1st, RI in second.
Well, any other place would be fine, just making a suggestion where it might be useful.
Another good place would be where the icons are. First row of the icons could be +, -, edit. Second row could have RI and the current icon to add marketing campaign next to it.