what do the instructions say?
(I already know what they say, point is each meter varies slightly about its lay out and my reply would be longer than the instructions, which means you would have to read a very long post, so why not read the instructions as it will be easier and quicker)
RF Lighting is saying that if the manufacturer says it should be connected via a 13A fused spur, then that is how it should beconnected. it does not mean though that it should have a 13a fuse. The fuse rating will depend on the item itself
if you are saying you can operate the same light from 3 places it will not work, since each switch you have mentioned only has 3 terminals.
your middle switch must have 4 terminals (look at the old one) its called an intermeadiate.
your next step is identify what wire goes whwere, which is...