DCT-CX

Hello, I am a rookie to Shotguns (mostly handgun experience). I recently purchased a Benneli Nova Pump. It would appear that the plastic rod that limits magazine capacity to 2 rounds is indeed installed as the manual indicates. I must be dense as it's just not obvious to me how to go about removing it (Yes, I have the manual in front of me). So I have some very basic questions and hopeful you guys will bear with me and set me straight! :-) I have removed the barrel .. and from here it's all down hill. Step 3 in the directions indicates sticking a screwdriver inside and holding the spring & retainer in place. In my case I believe this is the red "+" shaped spring loaded plug that presses up against a black piece of metal that sits ~1/3" from the end of the magazine tube. This black metal piece, which I think is the retainer ring seems to be my problem (if I'm not already off in the weeds). I'm having a bugger of a time getting my pliers to take hold of the two tiny holes (which I think I need to use to compress and remove the ring). Perhaps I just need to go buy some really small needle nose pliers ... but how much pressure should this require? Thanks, DT