Elevation - Placing Part -

So, I’m trying to design a pump rack for my CNC. I have the bottom and middle sections done, but can not figure out how to place the top section onto the stand. I will admit I do not use SketchUp a lot, but have an understanding of it and use it for different things. Just not sure how to complete this portion of it.

TIA for the help.

Becker_Pump_Stand.skp (89.3 KB)

It would help if you used groups and components, however, you see here I first triple click to select all the connected geometry and make it a group, then use the move tool to grab it by a specific point and place it on the other geometry.

Thank you for the help with this. Worked perfectly. I will make a note about groups. Thank you again for the help.