This video explains how to cut the unused part before side wiring.
In this product, i-PRO compact dome camera, the shape of the enclosure has been slightly changed since a certain point in time.
This video shows both the before and after.
[X-Series]
WV-X35402-F2L / WV-X35302-F2L
On-board model : WV-X35402-F2LM / WV-X35302-F2LM
[S-Series]
WV-S35402-F2L / WV-S35302-F2L / WV-S32402-F2L / WV-S32302-F2L
WV-S35402-F2LG / WV-S35302-F2LG / WV-S32402-F2LG / WV-S32302-F2LG
WV-S35402-F2L1 / WV-S35302-F2L1 / WV-S32402-F2L1 / WV-S32302-F2L1