Tank commander in SPGs

[sgtToni95]

Hello everybody!
In the game you can put a tank commander inside artillery "tanks" like priest, grille hummel etc. As far as i know tank commander give bonuses mainly useful against other tanks, like increased accuracy, reload time, penetration and received accuracy. So what are the buffs a tank commander gives to artillery vehicles?
Thanks in advance

[JimQwilleran]

Well, increased accuracy and decreased received accuracy can be quite useful for SPGs battles . But generally, if I have some other tanks than SPGs, I rather put TC in them.

[Warhawks97]

commander vet increaes penetration, accuracy and reduces received accuracy.

But not quite sure how it affects enemie incoming arty shells (as they have a scatter anyway). But scatter and accuracy seems to be different. So i really cant say if it also helps that enemie arty will hit your spg less likely.