i just purchased a boat with a hardtop that has lee sidewinder outriggers on the top. on the outide of each outrigger is a small "poleholder"installed down thru the roof,[on an angle outward] also in the middle of the top at the rear is a small "poleholder" protruding up thru the roof.[on a rearward angle] i am assuming that these extra "poleholders are for rigging the fishing lines to the outriggers but i have no idea how,or what type "poles" to use on the outside and center rear holders. also the diameter of these extra holders are a lot smaller then a regular poleholder. could the center rear holder be for a center fishing line ?