Pictures would help too and might take less typing.

On the AquaPro feeders there's two aluminum brackets that screw right to the side of the feeder hopper, and the solar panel bolts to those brackets.

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).