Uppercases slot defines.

code/modules/admin/secrets.dm

@@ -430,7 +430,7 @@
 						var/obj/item/clothing/under/schoolgirl/I = new seifuku
 						var/olduniform = H.w_uniform
 						H.temporarilyRemoveItemFromInventory(H.w_uniform, TRUE, FALSE)
-						H.equip_to_slot_or_del(I, slot_w_uniform)
+						H.equip_to_slot_or_del(I, SLOT_W_UNIFORM)
 						qdel(olduniform)
 						if(droptype == "Yes")
 							I.flags_1 |= NODROP_1

code/modules/admin/topic.dm

@@ -1493,8 +1493,8 @@
 
 		if(ishuman(L))
 			var/mob/living/carbon/human/observer = L
-			observer.equip_to_slot_or_del(new /obj/item/clothing/under/suit_jacket(observer), slot_w_uniform)
-			observer.equip_to_slot_or_del(new /obj/item/clothing/shoes/sneakers/black(observer), slot_shoes)
+			observer.equip_to_slot_or_del(new /obj/item/clothing/under/suit_jacket(observer), SLOT_W_UNIFORM)
+			observer.equip_to_slot_or_del(new /obj/item/clothing/shoes/sneakers/black(observer), SLOT_SHOES)
 		L.Unconscious(100)
 		sleep(5)
 		L.forceMove(pick(GLOB.tdomeobserve))

code/modules/admin/verbs/debug.dm

@@ -476,7 +476,7 @@ GLOBAL_PROTECT(AdminProcCallSpamPrevention)
 					id.forceMove(W)
 					W.update_icon()
 			else
-				H.equip_to_slot(id,slot_wear_id)
+				H.equip_to_slot(id,SLOT_WEAR_ID)
 
 	else
 		alert("Invalid mob")