While the crew had the HAM3 door off and were installing the Septum Window Cover, they also installed the HAM ISI Spacer (type for WHAMs 2 & 3) D1101180-v2 Type 00.  They used the 5" long ISI-through-spacer-to-Support-Tube bolts to constrain the position while bolting down the Spacers to the Support Tubes (Separate 3" bolts.)  The 5" bolts were then removed.

Thanks to Mark, Scott, Slim and the Devil Dog.