Parksy, They should fit inside the frame - captive & hidden from view
My CCM kit came with 2 screws supplied
Cheers Gary. Managed to work it out in the end!

just me in my excitement trying to work out at the office how to put it all together without the actual gun in front of me! Typical bloke, three steps ahead of himself!
Only think I have had to order is a 10-32 unf grub screw to replace the pan head that was previously holding on the beavertail and into the rex dialer! Need the rear to be flush to slide the frame on and couldnt do it with the screw there. £1.20 from an online model store! Fingers crossed it works okay!