Ah, you are right. Indeed, the LOI specifically says they are working with the Owens, who own parcel 0202150000, but not with Spice Parking who owns the lots on Spice Street.
In that case, I'd expect an entrance to be on Cambridge Street, right next to the I93 offramp. It seems silly to call this "TOD" and make commuters from Sullivan walk all the way around to Hood Park Drive.
View attachment 21956
Zooming in further, the map is still wrong, and calls the offramp "Brighton Street," and I93 itself "Alford Street" or "Caldwell Street" depending on where you're looking. I suspect the mapping software is erroneously pulling in nearby street names for roads that aren't in the Boston address system, like offramps or interstates.