Wiring up a light fitting advice needed

[Green Giant]

Hi
I’m normally.. fairly good with diy projects, but struggling to work out how to connect up the wiring for 5 led filament pendent lights to the ceiling rose above our dining table, it’s going to be similar to the image posted, I’m making it.
The cable to each pendent is 3 core as the pendent holders are metal and need a earth.
Im replacing the old lighting cable down from ceiling rose, to the beam where I’ll fit in a junction box.
I’m struggling to work out how I connect the 5 x 3 wires plus the 3 wires from ceiling cable, into a junction box.
So 18 wires. Am I totally doing this incorrectly?
I’m guessing I can’t connect up lights in series as led bulbs?
Any help in what junction box or wiring connecters to use much appreciated.

 

[Salty Spuds]

3 x 6 way WAGO blocks will do it. Rout a recess in the top of the lump of wood, common up all the cables & hide in the recess, bring a single feed down from the ceiling into the common blocks.
Wago 773 Series 24A 8-Way Push-Wire Connector 50 Pack - Screwfix

 

[Green Giant]

Ahh brilliant thanks, i had been looking at a different type of wago connector that wasn’t suitable , didn’t know these were available, yes iv routed out a channel in the beam and an area for junction box/connectors.
... about a year ago found a nice oak beam/ mantle in a skip, it’s been in the garage since so time to actually make it.