82 300SD Fuse box electronic switches

I am in the process of installing the Elsbett conversion kit to single tank and was looking for the best place to cut in the electronic relays. I looked at the fuse box and see seven relays. Looking at the manual I discovered one is the Compressor relay (code J) but I can't find the rest. I find a K an L an F and a B and one each alongside the F and B. Any help would be great.
Thanks,
Kevin

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