Can I see photos of your catch can connections now?
I will assume:
You have a flapper valve connected to your stock VC. That flapper has a hose and clamp on it that goes to your BMS can inlet.
The outlet from that BMS can goes to your intake inlet using that U bend hose.
You have the RB external PCV. This is the one with the barb/nipple on it, not the one you put the plastic cap back over. This hose goes to the inlet of your mishimoto can. The outlet of this mishimoto can goes to a fitting that connects to your throttle body.
Assuming the above is true, then you have the typical 'external PCV' setup.
When you buy this new cover you will need:
High Side:
10AN ORB to (5/8"?) hose barb
5/8" heater hose
Flapper valve
Screw the -10 ORB into one of the rear VTT ports. Slide a short run of heater hose over this barb, connect your flapper valve to this hose, and then connect your BMS can to the other end, just like it was originally. So the only difference is how the flapper valve connects to the VC.
Low Side:
10AN ORB to 1/2" barb or whatever works with your current hose.
barb check valve
Screw the 10AN orb into the other port, use some proper fitting heater hose to connect the check valve to this barb, this replaces the PCV valve.
Connect the other end of this check valve to your mishimoto inlet just like you would connect to the barb coming off the stock VC. Make sure you cannot blow into the mishimoto side of the check valve, as you do not want boost from entering the crank case.
You do not use the RB PCV valve, because there is not a place to screw it. You use a normal check valve in this case.
You don't have to buy these parts exactly, but I gave you links to reference. The size of the hose, 5/8 or 1/2, I guess thats up to you to figure out what size you need exactly. You don't have to use hose barbs on the low side, this is an opportunity to convert to stainless steel hoses if you wanted. Its more money and more pain to work with and scratch things (they also conduct electricity so keep them away from your battery posts).
So hopefully its clear, the only thing changing is the fittings from the VT to the inlets of both your catch cans. The outlets from your catch cans go to the normal places.
The main take aways:
There is no more RB PCV Valve, you are now using a normal check valve, preferably a very high quality one
The flapper has now lost both ends of its OEM connections, and you'll need to put heater hose on the VC side as well in order to keep it in the system.