I'm such a dirty girl.
Get a dildo made for a fucking machine and a length of 1/4" or larger diameter conductive rubber tubing available in many places including amazon for those too lazy to do a real search. Using a scalpel, razor, Xacto knife, dremel or similar tool, ream out grooves on both sides of the dildo in which the conductive rubber tubing will be placed. It's good to SLIGHTLY undersize the grooves so the conductive tubing protrudes very slightly from the surface of the dildo. After confirming the fit, take some GE silicone and carefully inject it into the grooves. Then place the conductive rubber tubing that has previously had the wires connected to them by wrapping them tightly, securely, achieving good contact around the tube and then siliconing the wire to the tube. The wire must be in good contact with the tube before siliconing or else the silicone will act as an insulator and the tube will not be electrified. Make sure the outer surface of the conductive rubber tube is NOT covered with the silicone holding the tube in place on the dildo or you won't get even electrical contact with your anus and colon during the old in and out's.
Use a NEW dildo, not an old one that may have been affected or contaminated by lubricants before or you may find the conductive tubing may de-laminate from the dildo. You need good clean adhesion.
Make sure you have cleaned the conductive tubing with a good solvent to clean off any releasing agents that were used in the manufacture of the tubing. You can use conductive silicone or carbonized rubber conductive tubing.
If you want to be creative, the grooves for the conductive tubing can be straight, spiraled or whatever you like.
Just a warning for use: make sure you have it well inserted up your ass BEFORE turning on the fucking machine or the electricity. Use a real e-stim generator, not the wall socket or stereo speaker leads--you could get electrocuted. Keep in mind that if you like the super long dildos that the electric stimulation will be felt throughout a good part of your lower body as your spinal nerves will be stimulated.
Does it look like we've done that? 😁 😁 😁