I wouldn't. The drain tube may be enough, just keep an eye on it. I don't recall if the drain tube is glued into the backwall, but if it isn't solidly glued you could remove it and enlarge the hole with a file so the wire can go through the hole outside of the tube, and then seal it well.
2020 Eagle HT 30.5 CKTS Modern Farmhouse (16" wheels, spring shackles set on lower hole of frame, SumoSprings TSS-107-40, standard kingpin, B&W Companion slider, TST-507 TPMS, Progressive Industries hardwired 50A EMS HW-50C)
2019 F250 SRW SuperCab 4X4 SB 6.2 (10,000# GVW) 3.73 Axle 18" wheels