GOJO soap dispensers such as LTX-7 use a plastic insert to enable the two front panel release buttons. This allows to open the cover without the need of the opening tool similar to thing 3287729.
If you lost yours, print this thing, open the cover and insert it as shown in the picture here and close the cover. The thing is symmetric so you can insert either way. Now you can open the cover by pressing the two buttons on the right and left sides of the soap dispenser, no tool required.
To remove this insert simply pry it out with a flat screwdriver or similar tools.
The Fusion 360 source file is also included here in case you want to customize it.