Baitchef,, you won’t get 3 keepnet fittings onto 2 legs so you’ll need to invest in an accessories bar first of all. I use a Fox one which is excellent but most of the other manufacturers make them, just make sure they’ll fit the Boss legs ! You can then buy accessory blocks with threaded bankstick connectors or ones that take banksticks [short or long]. In fact you can add as many blocks as you want to take pole socks, tulips, feeder arms, etc, etc.
The best thing I can suggest is to get yourself a copy of the Preston catalogue and look at the Off-Box stuff to give you an idea of what’s available.
PS, Your Pro-Logic connectors will still fit on the accessory blocks as they’re all a standard thread.