The PECO E95 point is designed to be operated by either the PECO PL-10 or PL-11 point motors. Other brands of point motors can be made to fit, for example Gaugemaster, SEEP, DCC Concepts and others. But as Rog above has stated, the R663 is very specific to old Triang Hornby track (now obsolete).
To use a decoder to operate points you need a DCC controller as well. So can you confirm what controller are you using and as Rog asked, what specific Hornby decoder have you purchased. The current Hornby decoder is the R8247, this replaced the R8216 (now obsolete and should preferably be avoided).
Assuming a Hornby R8247 decoder. Wiring Hornby point motors (use as an overview guide) to Hornby R8247 decoders is covered in this previous post: