Telescopes don't normally 'rotate'. That implies doing a full revolution on an axis. They just cover about 270* plus or minus a bit for special situations. So it's possible to arrange sufficient cable slack to allow that degree of movement with some extra just in case.
I use some Velcro bands at the top of the pier to secure cabling and allow changes when necessary. I also keep power away from data in case of possible corruption. Routing close to the head minimises lengths and twisting on connections. Every situation is different.
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