Jib Halyard Sheave Fastening

[Gray Drohan]

I finally got the mast for #223 re-cleared and I'm now re-assembling it.  Unfortunately, it's been so long since I broke it down that I don't recall how the jib halyard sheave was fastened.  The self-tapper is obvious.  But how should I through-bolt the loaded side?  Screw head out?  Screw head inside?  Where should the washer(s) go?  Can I assume that no backing plate is required since it's in a reinforced section of the mast?  I'd appreciate any input, including any pointers regarding the methods for getting it done inside the tube.  Thank you.