My 2 slides with electrical service have an arm that is hinged in the center. The wires are tie wrapped to it. As the slide extends or retracts the arm straightens or folds. You don’t say what the slide mechanism is but the ones I’m describing are “old school” thru frame, LCI I think. The arm is visible in the pic below. Side note: consider a TPMS.
Grrrr, prop your iPad against the sofa and lay on the floor to study the pic.
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Cheers,
T_
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks