I am not sure what a L/R system is (lower and retrieval?) but i have my spin pole attached to the forestay as follows:
I drilled a hole in the triangular plate that attaches the 2 bridals to the furler. I put a small shackle in that hole, and tied a line around the spin pole and shackle.


http://www.metalfree.com/a/cat/snuff.asp - snuffer system on my boat