I'd like to install a handheld shower bar (and diverter) on the wall that is adjacent to the shower head. Thus the pipes need to do a 90 degree turn. How can fit the pipe in there given the studs blocking access to the corner? On the picture, the shower valve is on the wall w/ the yellow insulation and I'd like to mount the handheld bar on the wall w/o the insulation. There are 3 studs (2x4).

My shower was done in PEX but I didn't think pex can turn 90 degree in a tight space. You can see the hot water pex line on the picture. I marked in blue where the pipe should go.

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