Hi Chip, the majority of the Sd Kfz 250 and it's sub-variants were issued to kompanies of Aufklarungs ( Recon ) Abteilungen from panzer & panzergrenadier divisions. The 250/4 and /5, used for observation were usually attached to sturmgeschutze batteries and the Sd Kfz 250/6 Ausf A & B leichte Munitionpanzerwagen carried the 7.5cm rounds of ammo for their respected StuG ausfuhrungs. In all there were 12 sub-varaints of the Sd Kfz 250 and they each had a "speacial purpose". ( Sd Kfz is the abbreviation for " SONDERKRAFTFAHRZEUG " which means "special purpose motor vehicle " )
The Sd Kfz 250/7 and /8 were issued to a platoon in the leichter ( light ) Panzer Aufklarung Kompanies and the /9 /10 and /11 usually went to Aufklarung platoon CO's. These vehicle's provided heavy fire support when in action
CLICK ON THIS LINK TO SEE PHOTO'S
http://homepage.tinet.ie/~nightingale/sdkfz250var.htm- ralph