Not that i'm aware I kinda winged it as I built the model.
Just drilled the feed holes for the wiring as I went and ran it all to the centre leaving the carapace unglued for access to the switch and batteries.
Heres where I got the kit from hope that helps.
https://www.smallscalelights.co.uk/product/3mm_led_kit_for_warhammer_40k_x4
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