Death Star 10188 Help with step 8 on page 76 On step 8 of page 76 I do not understand what holds the two sections together.  The "LEGO Flat Silver Technic Axle Joiner Perpendicular with Extension (53586)" has a smooth bore where it attaches to the "LEGO Medium Stone Gray Technic Cross Block 1 x 3 (Pin/Pin/Pin) with 4 Pins (48989)".  And directly under the first part is a Technic pin (part# 4211815) in yet another smooth bore opening (part# 4526985).

I do not see any clips, pins or other means of attaching these two components.
The &quot;LEGO Flat Silver Technic Axle Joiner Perpendicular with Extension (53586)&quot; smooth bore piece  is secured to a technic pin on piece &quot;Technic, Pin Connector Perpendicular 3L with 4 Pins (48989)&quot; installed in step 5, with the relevant pin marked in step 7 in my marked up directions below:

The smooth bore piece connects to the pin holding them together, with the lower axle connection preventing rotation.