WIRING DIAGRAM FOR SUFFOLK SUPER PUNCH 43s?

HI,
I RECENTLY BOUGHT A SECOND HAND (PROBABLY MORE LIKE TENTH HAND!) SUFFOLK SUPER PUNCH 43s I'D SAY IT WAS LATE SIXTIES OR EARLY SEVENTIES AS IT HAS STICKERS ON IT RATHER THAN PAINTED BRANDING.
tHE ONLY PROBLEM IS THAT IT DOESN'T HAVE A SPARK... I TRIED A NEW SPARK PLUG BUT STILL NOTHING, I'VE CONNECTED A CONTINUITY TESTER BUT THE HT LEAD DOESN'T SEEM TO BE CONNECTED TO ANYTHING... WHERE THIS LEAD GOES INTO THE BLACK BOX (WHIOCH I AM TOLD IS A "STATER PLATE" SYSTEM, THE RUBBER THAT SEALS THIS BLACK BOX IS SPLIT... I@M NOT SURE WHAT TO DO NOW, SO ANY HELP WOULD BE GREATLY APPRECIATED!
CHEERS,
DAVE