The rig used was a regulation 'L' bar rig, goes something like this -
The bait is reverse rigged with the hooks pointing back towards the tail, fins clipped and towed through the water tail first. Add a glow skirt as desired.
9 ft 300# leader crimped to a swivel (no snaps please) and a blinky light
150 ft of 300# wind on leader to the main line.
A few feet down the leader from the join to the main line add a wax thread loop. The 'L' bar is clipped on using long line clips with the long arm of the L pointing towards the bait, and the short arm down. The first clip is at the angle of the L and goes on the wax loop and the second long line clip at the end of the long arm towards the bait.
The weight is typically 10-15 # stick, can be lead, re-bar steel, concrete etc and is on a break away line about 3 ft of 50# mono. This clips to the short arm of the L.
To deploy, run the boat into the current at idle and stream the bait, attach the L bar and weight and drop. Once there is about 10% more line out than water depth allow the boat to slow and let the line swing gradually vertical, find the bottom and come up 50 to 200 ft. Run the boat gently to keep the line out to the side of the boat and away from props etc. all the while traveling across the bottom at less than 3 kts.
In the gulf stream we were moving the boat through the water at 2 kts to the south, but actually traveling north at 2.8 kts over ground. Depending on your local currents you will need to make whatever adjustments are required to keep the bait moving through the water and not still.
Watch the rod tip at all times, the bite may be subtle, this fish barely moved the rod tip and in fact there was considerable debate on the way up as to wether or not there was even a fish on at all. The weight was at about 80ft when the fish finally 'woke up' and the fun started.