try hanging the cable , drip wd into it or make a small cup out of a thing called plastcine i think its called not sure of spelling on that one

cup around the top of it and fill with wd crc or the like , dont cut cables that do a specific job as they are a correct length inner and outer .
yeh trim throttle cables but not those , the fit into brackets at both ends so to shorten will make it tight outer , stressed inner (like me) we gotta keep sharp things away ?