Seth - The armoured cover of the smoke grenade rack is missing on that Ausf. B but heck, you can always hang the mandatory/multiuse zinc bucket from it
Hopefully, we'll get to see StuG III Ausf. A in the French campaign. It should have good ability to "blow some smoke" - with five smoke grenades on the rear and 10 x Nebelgranaten on board. And the speed, it could hit over 60 km/hr; it's rather telling that all Ausf. A required transmission and engine swaps after the French campaign (10 gear S.R.G.32 8 145 replaced by 6 gear S.S.G.77).
StuG III Ausf. A from Sturmbatterie 660, that got stuck in mud while supporting the infantry attack on Xertigny, 18 June 1940.
Spoiler
After knocking down a street barricade, StuG drove through thick stone wall and got stuck on marshy meadows behind it.
Uffz. Heinrich Engel fought with his Ausf. A until the end of 1941, until it skidded down the 10-meter deep slope into the Shosha river. By that time, StuG had over 7,000 km in pedometer.