Has anyone got advice for cooking/smoking this style of beef skirt?

I’ve picked up a couple of these:

https://www.sainsburys.co.uk/gol-ui/product/sainsburys-beef-skirt

The packet says it’s a 4 hour slow cook. I’m a complete beginner to smoking and slow cooking on a BBQ, but figured these are cheap enough to practice on.

From what I’ve read, I need to run around 120-130c using a snake setup. I have a CosmoGrill XXL and I’ve heard they’re not the best for holding temperature but I’ll hopefully figure out how to keep a consistent temp.

Has anyone done a similar cut and got any tips so I don’t mess it up?

What grill temp do you aim for? Do you wrap the meat? If so, when?

Do you cook to temp or tenderness? What temp? How do you decide tenderness?

Any advice would be appreciated.