Panaracer kit has a hole in the end of the needle tool, but I’ve never been able to thread the patch through it as it’s quite thick even when cut down.
Used it once punching the patch through which kept sticking a hole in the patch strip, but with the glue and sealant it held. Messy job.
I’m almost certainly not doing it right. Instructions are useless but the diagram shows it threading in and then pull back out to double it. Could never get that to work. Someone else recommended it highly and said it was easy.
The benefit of Weldite is you get a large sheet of patch material and just cut what you want.
If it’s non trail side fix or you don’t mind taking the tyre off the rim on the trail (depends if you can get the tyre seated again), I’d go with a boot patch inside. A number of “tubeless” kits for this or you can probably use a peel and stick style tube repair patch as the kit I’ve got basically is the same stuff.