美国采购需求：电池式燃气点火器，燃气点火器，燃气点火器+燃气点火器，燃气烤箱点火器，燃气脉冲点火器，燃气点火器

I'm looking into using an igniter for a specific application and need some clarity on its wiring. I think the terminal labeled "a" is where the spark originates, but I suspect a proper grounding connection is essential for it to function effectively. Could you provide a wiring diagram or any relevant schematics showing how to establish the ground for the spark? Alternatively, if you have examples of appliances that utilize this igniter and their wiring configurations, that would be super helpful too. Thanks!