ABS sensor rear cable

Good evening After a few tests I found out now that the wheel sensor is actually defective at the rear right (control unit is ok and soldered). Resistance measurement on the sensor … it really is. Now to my question… I have heard that when you pee out the cables, you can stick the new cables to the old cables and pull them up in the trunk without having to drain the tank. Does anyone have experience with it? Would you like to let off the tank, because I have heard that sometimes the welded nut of the tank belt can tear down in the body and you can’t get to it any more 🙁 If you were great, you could give me some information about this vehicle: V70i 2.5 144PS