Where is +1 valour troop info stored?

[Maeda Toshiie]

At least in VI 2.01, its in the unit stats file. The Gnome editor picks it up. There is a column where the bonus province is listed.

[Ludens]

It is in column 13 of the unit production file. Be aware that making a unit receive a bonus in two provinces does not work. Both Sipahi and Berber camels are listed as receiving a bonus in two provinces, but in the game only the first province is listed and they only receive the bonus in that province. Also, the extent of the valour bonus is not noted either (an assassin receives +2 in Syria).