What do you mean? Just slap a bit o' steel (or wood even) over the hole and she'll be right as rain.Short of some very basic field repairs (if any) there will not be any way to repair extensive damage taken whilst playing as armour. It's too unrealistic to just have a player blast the tank with a blowtorch and magically repair damage.
Those earlier German tanks had a lot less technical equipment, especially the Panzer 1/2 which had a lot of room for shells to go in and out (especially small calibers at the time) with the only real thing in the way being soft fleshy bits. But still, even a tank with a shell through it would have to be recovered, cleaned out from any blood, and rewelded, all things that took time. German repair turn around was excellent, generally tanks knocked out in combat were not even registered as knocked out, merely damaged and repaired (leading to historian issues with understanding the effectiveness of the Panzers in 1939/40, as German tank destruction records do not actually show the entire truth, since it would not actually show the number of tanks knocked out in combat).True. However, I have seen pictures of German tanks during the 1940 Blitzkrieg that had steel circular plates welded over holes made by French 25 mm AT-guns. That said, in 1944 it was a whole different story, though.