Here is a video on the basic on how to make the stuff chicken wing. It would show you how to cut the wing since I can't show you in person how to do it. You can follow the same ingredient that they're using in this video or just do accordingly to your own liking.
I personally don't use all the ingredient they use. I do it the way my mom do it, since it already tastes good to me that way. You can use any ground meat that you like eating, pork, chicken, beef, etc. Go wild..
I would only use the lime leave, turmeric powder, lemon grass, garlic, salt, sugar, and msg or you don't have to use msg. It's really up to your preference but my mom said it won't taste good without the msg.
Glass noodle and a mushroom to your liking.
As far as marinating the chicken wing on the outside, I don't use the bbq sauce. I leave it plain. If you put enough seasoning inside the wings, I wouldn't care to put more taste on the outside because it takes away the favoring that you put on the inside, but then again, it's really up to your preferences. We all like differently.