This would be really cool and historically accurate, adding more ways to take out tanks, especially in moscow where AT weapons were basically non existent, or were very bad.
Both the T35 and T42 can be fitted with a “Zündverzögerung 10 s” - This is a 10 second ignition delay.
By fitting this thing in, you have 10 seconds to throw it before boom. You should be able to throw it a very small distance, maybe a few meters.
Also add in a key, use maybe “Page up” and “Page down” similar to how you adjust panzerfaust sights, to be able to flip the mine around, so you can throw it inverted, if you want to throw it on the top of the tank, and you can throw it normally if you throw it by lets say tracks.
I asked on a reddit page about this so if you need more information, many people who know more than me answered.
This way is really realistic and a lot harder. Since you have a long fuse, short throwing range, also have to determine how the mine will land. Like if you want to throw it on the top of the tank, you have to throw it inverted, if by the tracks normally.
This is a skill weapon like the molotov and TNT (Not dying), unlike the explosion pack
They have around explosive fill equivalent to around 5kg of TNT from damage model, described as engineering explosive so TNT equivalent per mass < 1 (even very advanced military explosive seldom go above 1.7), but they are thrown as 1.2 kg in game. If any soldier can throw them in realistic weight as far as in game, definitely gold medal in Olympic Game.