This is a post after a long time.
I installed a slip ring to allow the turret to turn 360 degrees. I made a pedestal made of plastic material that fits the internal shape of the turret for fixing the slip ring, and fixed it with a cable tie. The pedestal itself is fixed to the bottom of the turret with double-sided adhesive tape. With this mounting method, it is relatively easy to attach and detach the slip ring later. For maintainability, all wiring cables from slip rings are connected to the pin connectors.
Initially I wondered if a cable guide would be needed behind the turret's rotating ring to prevent the cable from twisting, but the turret could rotate 360 degrees without the cable being twisted without the guide. The cables between the turret and the hull are for the turret swivel motor, servo (barrel recoil and lifting), MG (CROWS and barrel MG), barrel firing LED, and search light LED next to the anti-sniper machine gun.