First I see now you have a "Performance Aircraft". I mistakingly read "Precision Aerobatics" , my bad. Still I'll assume your kit has a motor- mount to attatch the motor to. Refering to your pic, the motor slips through the planes motor-mount like shown. But, don't use the disks or other parts from there just install the correct size and length bolts through the mount and into the 4 pre-taped holes in the motor housing. The Disk and cross are for mounting the motor to the firewall and running the motor backwards. Your motor came with two prop adapters, one goes on the shaft and one goes on the can. Use either but not both, and pick the way thats best for your plane.