I just unboxed my Monoprice Maker Select Plus and I have run into an issue with attaching the tower frame to the bed. As I am trying to slide the tower frame back on the bed to align the screw holes, I can’t go back far enough because the nozzle is lower than the build bed. I can’t lower the bed, and I can’t raise the extruder because it isn’t connected to power yet. Also, I can’t slide the tower frame onto the bed from the back because of ribbon cables in the way. Does anyone have any ideas on how I should proceed. Also, this is my very first 3D printer and I am totally new to all of this, so please be gentle with your responses. I look forward to hearing from more experienced printer users. Thank you TJD.