Howdy from sunny California!!!
You could try out a snake or chain setup like so:
Stack about 2-3 wide & two high, then add a few wood pieces every so often...
Lite one end with about 6-8 beads & let it burn like a fuse.....start with bottom vents maybe half (or a little less) open, top vent all open to get a good clean exhaust......
Take your temp at grate level, near the meat, but not right over the burn area....
I go for about 260 ~ 275 F (don't know Celcius!) & it takes from 8~10 hours usually, for a fairly large piece....8~10 lbs. (don't know Kg. !!)
This is a really easy, almost foolproof way to run a Kettle......just check every few hours to make sure you're burn's moving along....
& check for a really easy probe tender (skewer, icepick, etc,) late in the game.....
If it's bone-in, check for the bone to wiggle free.....
It's really is pretty easy work....these six ran all nite by themselves....
Have fun & check back in with other questions / observations, etc.
Oh...and wrap in tinfoil & an old towel & rest it at the end....that really helps it tenderize & come out better....