Broken windscreen drain pipe

Hi I've a 1991 LH119 I had a significant leak coming into the carpet on the drivers side. Has to get the sills welded and they took out the windscreen at the same time and found a rust hole at the top, the water was coming down the door columb.

Thats been fixed and we replace the seal at the same time, infact its a new windscreen they cracked putting it back in. The carpet is still damp. I couldn't find any water coming it from the door columb but under the windscreen is a bit damp, tiny amount of water. Then I found that the drain hose from the lower windscreen drivers side had parted from the tray that catches the water. The plastic fitting snapped

How do I fix this, can I get at it by taking out the dash, or does the windscreen have to come out too.

I found a thread from 2012 where they sealed up the windscreen and plugged the hole, am I storing up trouble doing that.

If it makes any difference I'm in Dublin and 4 or of 10 mechanical skills.

https://hiace-super-custom.forumotion.com/t2296-leak-suddenly-coming-from-above-accelerator-pedal-area?highlight=windscreen+leak

There are 2 different designs with hiace windscreens. 1 has drain holes 1 doesn’t. They have completely different windscreen sealing trims. The non-drain holes trim design is prone to trap water and rust at any place right around the screen including the roof edge. If whoever put the screen in used sealant where they weren’t supposed to it can result in water leaking into the cabin. I wouldn’t be surprised with an installer that isn’t used to this model of Hiace. Blocking the drain hole without knowing that the install was done with that in mind could lead to trapped wayer and either rust starting pretty quickly or water coming in somewhere else.

Mine is 91LH119 it has the drain hoses, I've had it in my hand as it's snapped at the top.

Yeah. So if you block them, because it’s designed with them to drain the water, you’ll likely get that water coming in somewhere else.

Unless you can be sure the screen was bonded and sealed in.