Gary
Perhaps it is too late but you should always provide access to the outlet . Cut the end of the tube on a long angle and exit it thru fuse side or bottom. If there is no wood at the exit point install a piece of balse between frame members, and ca tube to it. Unless your fuse is real long you will for sure bunch your antenna up inside. You could try to fold about 1/2 inch of antenna over/thru a fairly loose fitting slot ina piece of THIN wood and hope the antenna doesn't come back out with the stick. Let us know when you solve it. You can make a neat installation by taping the ant along the bottom of the fuse.

Good luck.